The 100 best dive sites in the world

The diving industry relies heavily on popularity polls to generate awards. Those polls often reward destinations with large marketing budgets or easy access for the North American and European markets. A site's presence in a top ten list often correlates with the marketing bandwidth of the resorts operating there.

The research stripped away the marketing hyperbole and evaluated each site against four strict criteria.

1. The reliability of the signature encounter. The list measures the encounters typical of a normal trip rather than a single lucky day.
2. The biomass and the condition of the reef. The ranking relies on independent survey data and park records where available to assess coral health and fish density.
3. Accessibility to an ordinary certified diver. The list assesses whether a competent recreational diver can safely manage the site or if it requires expedition-level technical training.
4. The strength of protection. The research looks at how well the local authorities enforce their rules and whether the ecosystem is shielded from commercial fishing and mass tourism.

The absolute peak of global diving. These 10 sites deliver the highest concentrations of marine life and the most reliable encounters on the planet.

1. Barracuda Point

Country: Malaysia | Access: Day boat | Skill level: Advanced | Best months: Mar–Oct | Signature encounter: Barracuda tornadoes | Ave depth: 20 m | Max depth: 40 m This site sits on the northern edge of Pulau Sipadan in the Celebes Sea. The dive operates as an intense open-ocean wall drift. The signature encounter is the swirling tornado of chevron barracuda and bigeye trevally tightening into a column when the current runs. You often see green and hawksbill turtles alongside herds of bumphead parrotfish crossing the reef flat.

Sipadan is Malaysia's only oceanic island and it rises 600 m from the seabed. The protection here is the gold standard. Sabah Parks issues 254 Sipadan permits a day and the island is closed entirely every November to allow the reef to rest. All resorts were removed from the island by the end of 2004. Because the currents are unpredictable the park enforces an Advanced Open Water rule. The daily cap of 254 visitors keeps the reef in excellent condition.

2. Blue Corner Wall

Country: Palau | Access: Boat / Liveaboard | Skill level: Advanced | Best months: Dec–Apr | Signature encounter: Grey reef sharks | Ave depth: 18 m | Max depth: 30 m This site sits off Ngemelis Island and offers arguably the most famous current-based encounter in the world. Divers make a negative descent to the plateau and attach a specialised reef hook to their buoyancy compensator. You hang stationary in the flow where grey reef sharks often surf the upwelling just metres away.

Palau established the world's first national shark sanctuary in 2009 banning all commercial shark fishing across its Exclusive Economic Zone. This policy directly resulted in the massive shark populations witnessed today. The reliability of this shark encounter is exceptional providing powerful water movement exists on the tide.

3. Cape Kri

Country: Indonesia | Access: Boat / Liveaboard | Skill level: Advanced | Best months: Oct–Apr | Signature encounter: Biodiversity record | Ave depth: 20 m | Max depth: 30 m Located in the Dampier Strait of Raja Ampat this sloping coral ridge intercepts massive volumes of oceanic water. It holds an unbroken scientific record for the highest number of distinct fish species recorded on a single tank dive. The biomass is impenetrable with walls of sweetlips and wobbegong sharks resting under coral overhangs.

The visibility averages 15 to 20 m because the water is thick with the plankton that fuels the ecosystem. The currents are notoriously strong and frequently multi-directional requiring high spatial awareness and rapid buoyancy adjustments.

4. Pillars of Darwin

Country: Ecuador | Access: Liveaboard | Skill level: Advanced / Tech | Best months: Jun–Nov | Signature encounter: Whale and hammerhead sharks | Ave depth: 20 m | Max depth: 30 m Darwin Island sits in the remote northern reaches of the Galápagos National Park Directorate protected waters. The dive takes place on a submerged volcanic platform in cold water subjected to severe multidirectional currents. Divers cling to the barren volcanic rock in heavy surge to watch the pelagic column.

The signature encounter is the migration of massive pregnant whale sharks alongside continuous walls of scalloped hammerhead sharks. The conditions are actively hostile and access requires a gruelling 12-hour open ocean crossing from the central islands.

5. Bajo Alcyone

Costa Rica | Liveaboard | Advanced / Tech | Jun–Nov | Scalloped hammerheads | Ave depth: 25 m This submerged seamount lies off Cocos Island in the eastern Pacific Ocean. Divers make a rapid negative descent directly through the blue to the summit at 25 m and hold position to watch for schools of scalloped hammerheads. The site demands extreme physical exertion and a 36-hour ocean crossing that frequently causes severe seasickness.

6. SS Thistlegorm

Egypt | Boat / Liveaboard | Advanced | Sep–Nov | WW2 Wreck | Ave depth: 20 m | Max depth: 30 m This 128-metre British armed merchant ship sank in the Straits of Gubal in 1941. The holds remain packed with Bedford trucks and Lee-Enfield rifles creating an unparalleled World War II time capsule. The wreck operates as a thriving artificial reef but it suffers from crushing overcrowding. The sheer volume of daily dive boats has accelerated the structural collapse of the vessel.

7. Shark and Yolanda Reef

Egypt | Day boat | Intermediate / Advanced | Jun–Aug | Toilets and Spawning | Ave depth: 20 m Note: The research challenges this site's standing. The site suffers from massive unregulated daily diver traffic from Sharm el-Sheikh reducing it to a crowded tourist novelty.

8. Richelieu Rock

Thailand | Liveaboard | Intermediate / Advanced | Oct–May | Whale sharks and macro | Ave depth: 20 m | Max depth: 35 m This isolated limestone pinnacle in the Andaman Sea is completely covered in dense purple soft corals and sea anemones. The site is famous for seasonal whale shark visits but the dense macro life is the true reliable star. The Thai Department of National Parks enforces a total closure of the site for half the year to ensure ecological recovery.

9. Batu Bolong

Indonesia | Boat / Liveaboard | Advanced | Apr–Nov | Coral density and anthias | Ave depth: 20 m | Max depth: 30 m Situated in the central region of Komodo National Park this rugged rock pinnacle is swept by notoriously violent currents. Divers must stay in the sheltered lee of the rock to observe the absolute explosion of biomass. The rock is completely coated in hard and soft corals swarming with orange anthias and hunting giant trevally.

10. North Atoll (Washing Machine)

Philippines | Liveaboard | Advanced | Mar–Jun | Megafauna and healthy coral | Ave depth: 20 m | Max depth: 30 m Located in the remote Tubbataha Reefs Natural Park this site features sheer atoll walls dropping thousands of metres into deep water. The current is severe and swirling. Divers explore untouched coral ecosystems where tiger sharks and manta rays are among the highlights. The UNESCO World Heritage park is guarded year-round by marine rangers.

This band features the world's most famous accessible wrecks and reliable manta ray cleaning stations.

11. SS Yongala

Australia | Day boat | Advanced | Jun–Nov | Wreck and massive biomass | Ave depth: 20 m | Max depth: 30 m This 109-metre passenger steamer sank in 1911 and sits unprotected in an open oceanic channel. It acts as an oasis on a sandy seafloor attracting massive Queensland grouper and eagle rays.

12. Manta Point

Indonesia | Day boat | Beginner / Intermediate | Year-round | Reef mantas | Ave depth: 15 m | Max depth: 20 m Located under the rugged cliffs of Nusa Penida this site features a relentless sweeping surge. The resident reef manta rays use the shallow coral bommies as cleaning stations with highly reliable encounter rates.

13. USAT Liberty Wreck

Indonesia | Shore | Beginner | Apr–Dec | Accessible wreck and macro | Ave depth: 16 m | Max depth: 30 m This submerged World War II transport vessel rests just offshore in Tulamben Bay. It is accessible to all levels and features a resident school of bumphead parrotfish.

14. Fujikawa Maru

Micronesia | Resort / Liveaboard | Advanced / Wreck | Dec–Apr | WWII wreck and artefacts | Ave depth: 18 m | Max depth: 34 m Sunk deep within Chuuk Lagoon this Japanese cargo ship sits upright and features intact fighter aircraft fuselages inside its open holds.

15. German Channel

Palau | Day boat / Liveaboard | Intermediate | Jan–Mar | Manta rays and sharks | Ave depth: 15 m | Max depth: 25 m An artificial waterway blasted through the barrier reef that funnels tidal exchanges. Manta rays gather over the sandy bottom to filter-feed in the nutrient-rich flow.

16. Manta Alley

Indonesia | Liveaboard | Advanced | Oct–Apr | Mantas in current | Ave depth: 15 m | Max depth: 25 m Located in the isolated deep south of Komodo this site is battered by the Indian Ocean. Freezing upwellings draw massive numbers of reef mantas to feed in the severe currents.

17. Blue Heron Bridge

USA | Shore | Beginner | Year-round | Rare muck and macro | Ave depth: 5 m | Max depth: 6 m This hyper-shallow urban muck dive in Florida is executed exactly at high slack tide. It offers North America's premier macro environment with frogfish and mimic octopuses.

18. Cod Hole

Australia | Liveaboard | Beginner | Aug–Dec | Potato Cod | Ave depth: 15 m | Max depth: 20 m Note: The research challenges this site's standing. The potato cod encounter is highly sanitised and historically dependent on diver feeding creating an artificial dynamic. The surrounding reefs have suffered extensive coral bleaching.

19. Sardine Run (Moalboal)

Philippines | Shore / Day boat | Beginner | Year-round | Sardine baitball | Ave depth: 15 m | Max depth: 30 m A stationary aggregation of millions of sardines gathered just offshore along a steep coastal wall. The shallow proximity makes it highly accessible for all skill levels.

20. Kimud Shoal

Philippines | Day boat | Advanced | Year-round | Thresher sharks | Ave depth: 15 m | Max depth: 30 m Divers drop at dawn to look for thresher sharks using Kimud Shoal as a cleaning station.

This group covers extreme pelagic drop-offs in the Red Sea and remote Pacific pinnacles.

21. Elphinstone Reef

Egypt | Day boat / Liveaboard | Advanced | Sep–Nov | Oceanic whitetip sharks | Ave depth: 20 m | Max depth: 40 m An offshore cigar-shaped reef plunging past 100 m into the open ocean. It is famous for powerful currents and highly reliable autumn encounters with oceanic whitetip sharks.

22. Brothers Islands

Egypt | Liveaboard | Advanced | Sep–Nov | Oceanic whitetips and wrecks | Ave depth: 25 m | Max depth: 40 m Isolated volcanic outcroppings featuring dramatic drop-offs covered in dense gorgonian forests. Egyptian law strictly mandates 50 logged dives to manage the severe blue-water currents.

23. Daedalus Reef

Egypt | Liveaboard | Advanced | Summer–Autumn | Scalloped hammerheads | Ave depth: 25 m | Max depth: 40 m A massive standalone reef topped by a 19th-century lighthouse. Divers wait in the blue off the northern point to intercept schools of scalloped hammerheads rising from the deep.

24. Roca Partida

Mexico | Liveaboard | Advanced | Nov–May | Pelagic shark density | Ave depth: 20 m | Max depth: 40 m A tiny guano-covered pinnacle in the Revillagigedo Archipelago south of Baja California. The vertical walls host immense aggregations of whitetip reef sharks and oceanic manta rays.

25. The Boiler

Mexico | Liveaboard | Advanced | Nov–May | Giant oceanic mantas | Ave depth: 20 m | Max depth: 30 m A submerged volcanic pinnacle off San Benedicto Island. Giant oceanic mantas use it as a massive cleaning station and frequently hover directly over exhaust bubbles.

26. Sail Rock

Thailand | Day boat | Beginner / Advanced | May–Aug | Schooling trevally | Ave depth: 15 m | Max depth: 36 m Note: The research challenges this site's standing. The dive centres on reef fish in variable visibility.

27. Koh Bon and Koh Tachai Pinnacles

Thailand | Liveaboard | Advanced | Feb–Apr | Mantas and pelagics | Ave depth: 20 m | Max depth: 40 m Submerged boulder formations in the Similan National Park subject to sweeping currents. They are legally closed for half the year to allow the ecosystem to recover.

28. Manta Reef

Mozambique | Day boat | Intermediate / Advanced | Sep–Apr | Manta rays | Ave depth: 20 m | Max depth: 30 m Located in the warm Agulhas Current this reef features extensive coral formations and sandy gullies that attract resident reef and oceanic manta rays.

29. Aliwal Shoal

South Africa | Day boat | Intermediate / Advanced | Aug–Nov | Ragged-tooth sharks | Ave depth: 15 m | Max depth: 27 m An ancient fossilised sand dune requiring an extreme surf launch to access. It hosts massive congregations of ragged-tooth sharks mating in the summer months.

30. Protea Banks

South Africa | Day boat | Advanced | Jan–Mar | Bull and tiger sharks | Ave depth: 30 m | Max depth: 40 m A deep fossilised sandbank generating severe currents. It is the premier territory for Zambezi sharks and tiger sharks demanding absolute comfort with blue-water drift diving.

This section highlights the dramatic sinkholes of Central America and the sheer walls of the Caribbean.

31. Cenote Dos Ojos

Mexico | Shore | Beginner | Year-round | Cavern formations and light rays | Ave depth: 5 m | Max depth: 10 m A shallow freshwater cavern dive in the Yucatán Peninsula. Divers swim through forests of limestone stalactites lit by sunbeams in very clear water.

32. The Great Blue Hole

Belize | Day boat / Liveaboard | Advanced | Aug–Oct | Karst limestone stalactites | Ave depth: 30 m | Max depth: 40 m A massive marine sinkhole measuring 318 m across. Divers execute a rapid negative descent to weave between massive suspended stalactites formed during the last ice age.

33. Half Moon Caye Wall

Belize | Day boat / Liveaboard | Intermediate | Dec–Jun | Eagle rays and sheer wall | Ave depth: 20 m | Max depth: 35 m An undulating sheer wall on the outer edges of the Lighthouse Reef Atoll populated by massive barrel sponges and cruising spotted eagle rays.

34. Bloody Bay Wall

Cayman Islands | Day boat / Liveaboard | Advanced | Year-round | Vertical drop and biodiversity | Ave depth: 15 m | Max depth: 40 m A dramatic coral precipice off Little Cayman that begins in shallow water before plunging vertically into the deep ocean. Visibility routinely exceeds 30 m.

35. USS Kittiwake

Cayman Islands | Day boat | Beginner / Intermediate | Year-round | Intact submarine rescue ship | Ave depth: 15 m | Max depth: 20 m A decommissioned 155-metre US Navy ship intentionally sunk as an artificial reef. Storm surges have rolled it onto its port side creating fascinating ambient-light swim-throughs.

36. Stingray City

Cayman Islands | Day boat | Snorkel | Nov–Apr | Southern stingray feeding | Ave depth: 2 m | Max depth: 4 m Note: The research challenges this site's standing. This is an operator-managed wildlife interaction zone located on a shallow sandbar. It operates fundamentally as a marine petting zoo rather than an exploratory dive.

37. Molokini Crater Back Wall

USA | Day boat | Advanced | Year-round | Drift and sheer wall | Ave depth: 25 m | Max depth: 40 m The back wall of this partially submerged volcanic crater off Maui drops past 90 m into the open Pacific. It demands excellent buoyancy control to handle the sweeping currents.

38. Kona Manta Ray Night Dive

USA | Day boat | Beginner | Year-round | Nocturnal manta aggregation | Ave depth: 10 m | Max depth: 14 m A highly orchestrated stationary night dive off the Big Island of Hawaii. Operators sink light boxes to attract phytoplankton drawing feeding reef manta rays directly over divers.

39. Devil's Throat

Mexico | Day boat | Advanced+ | Dec–Mar | Deep coral cave tunnel | Ave depth: 30 m | Max depth: 40 m A high-risk cavern dive in Cozumel. Divers drop down a narrow enclosed tunnel lined with red coral sponges that exits abruptly onto a sheer vertical wall.

40. Santa Rosa Wall

Mexico | Day boat | Intermediate / Advanced | Year-round | Drift and giant sponges | Ave depth: 20 m | Max depth: 30 m A classic high-speed Cozumel drift dive along a steep drop-off. Massive barrel sponges protrude horizontally from the vertical face while black groupers hold position in the current.

This band focuses heavily on the macro capitals of Southeast Asia and historic World War II wrecks.

41. Lembeh Strait (Hairball and Nudi Falls)

Indonesia | Resort / Liveaboard | Beginner | Mar–Oct | Cryptic macro and frogfish | Ave depth: 10 m | Max depth: 30 m The global epicentre of muck diving. Divers scan dark volcanic sand slopes to find rare nudibranchs and flamboyant cuttlefish hiding among the debris.

42. Lekuan Walls

Indonesia | Resort | Beginner / Advanced | Year-round | Sea turtles and vertical walls | Ave depth: 25 m | Max depth: 40 m Sheer vertical drop-offs in the Bunaken National Marine Park that plunge into the oceanic deep. The walls host enormous localised populations of green and hawksbill turtles.

43. Magic Mountain and Boo Windows

Indonesia | Liveaboard / Resort | Advanced | Oct–Apr | Oceanic and reef mantas | Ave depth: 15 m | Max depth: 30 m Submerged offshore pinnacles in southern Raja Ampat. The site features the rare simultaneous presence of oceanic and reef mantas using the cleaning stations under the protection of the Misool Foundation.

44. Blue Magic

Indonesia | Liveaboard / Resort | Advanced | Oct–Apr | Pelagic schools and current | Ave depth: 15 m | Max depth: 30 m An offshore finger-shaped seamount in the Dampier Strait. It requires a coordinated negative descent to intercept cruising grey reef sharks and highly camouflaged wobbegong sharks.

45. Secret Bay and Basura

Philippines | Resort | Beginner | Year-round | Nudibranchs and muck critters | Ave depth: 10 m | Max depth: 22 m Classic muck diving environments in Anilao. The substrate consists of black sand and discarded human artefacts harbouring an extraordinary concentration of rare cephalopods.

46. Apo Reef

Philippines | Liveaboard / Day boat | Advanced | Dec–May | Reef sharks and drop-offs | Ave depth: 20 m | Max depth: 40 m The largest contiguous coral reef system in the Philippines subject to notoriously strong currents. The strict no-take zone protects schools of scalloped hammerheads and blacktip reef sharks.

47. Washing Machine (Verde Island Passage)

Philippines | Resort | Advanced+ | Year-round | Extreme current | Ave depth: 20 m | Max depth: 30 m Note: The research challenges this site's standing. The site relies almost entirely on its hydrodynamic violence and severe down-currents operating more as a physical stunt dive than a reliable ecological encounter.

48. Irako and Okikawa Maru Wrecks

Philippines | Resort | Advanced / Tech | Year-round | WW2 Wrecks | Ave depth: 20 m | Max depth: 43 m Authentic Japanese combat casualties sunk in Coron Bay in 1944. The sheer size and depth of the wrecks require careful dive planning and wreck speciality training to avoid silt-outs.

49. The Drop-Off and South Point

Malaysia | Resort | Advanced | Apr–Oct | Barracuda and turtles | Ave depth: 20 m | Max depth: 40 m Dramatic sites on Sipadan Island offering vertical walls dropping directly from the shallows. The area is heavily protected by a daily quota system preserving the massive biomass.

50. Layang Layang

Malaysia | Arranged on request | Advanced | Seasonal, confirmed at enquiry | Hammerhead sharks | Ave depth: 25 m | Max depth: 40 m Layang Layang is seasonal, arranged on request and confirmed at enquiry.

This section covers the temperate outposts of Oceania and the remote atolls of Western Australia.

51. Poor Knights Islands

New Zealand | Day boat | Beginner / Advanced | May–Sep | Blue maomao and stingrays | Ave depth: 20 m | Max depth: 40 m Eroded volcanic remnants swept by the warm East Auckland Current. The absolute prohibition of fishing has allowed snapper biomass to surge by over 800%.

52. Milford Sound

New Zealand | Day boat | Advanced | Year-round | Deep-water black coral trees | Ave depth: 15 m | Max depth: 30 m A glacial fjord featuring a permanent tannin-stained freshwater layer. This dark halocline blocks sunlight allowing endemic black coral trees to thrive in shallow water.

53. Rainbow Warrior Wreck

New Zealand | Day boat | Advanced | Feb–Jun | Jewel anemone-encrusted wreck | Ave depth: 22 m | Max depth: 36 m The Greenpeace flagship scuttled as an artificial reef. The superstructure is heavily encrusted with brilliant jewel anemones and attracts vast schools of golden snapper.

54. Navy Pier

Australia | Day boat | Intermediate / Advanced | Year-round | Hyper-dense biomass | Ave depth: 10 m | Max depth: 15 m A working naval pier in Western Australia. It acts as an artificial reef in a barren sandy gulf delivering an overwhelming density of trevally and resident groupers in low visibility.

55. Ningaloo Reef Whale-Shark Sites

Australia | Day boat | Beginner | Apr–Sep | Whale sharks and mantas | Ave depth: Surface | Max depth: 5 m The world's largest fringing reef system. While the scuba diving is pleasant the site is globally renowned for its highly reliable surface snorkel encounters with whale sharks.

56. Osprey Reef North Horn

Australia | Liveaboard | Advanced | Year-round | Shark feed and 1000m walls | Ave depth: 20 m | Max depth: 40 m An isolated oceanic atoll rising vertically from the Coral Sea floor. Divers gather in a natural amphitheatre to witness controlled shark feeds involving massive silvertips.

57. Fish Rock Cave

Australia | Day boat | Advanced | May–Nov | Grey Nurse Sharks | Ave depth: 15 m | Max depth: 24 m A 125-metre fully enclosed ocean cave running through a rocky islet. It serves as a declared critical habitat for critically endangered Grey Nurse sharks resting on the cave floor.

58. Julian Rocks

Australia | Day boat | Beginner / Advanced | Oct–May | Leopard and Grey Nurse sharks | Ave depth: 15 m | Max depth: 24 m A biological transition zone where tropical and temperate waters collide. The beach surf launch is rough but the site hosts over 600 recorded marine species.

59. Ribbon Reefs

Australia | Liveaboard | Beginner | Year-round | Potato Cod and Dwarf Minke Whales | Ave depth: 15 m | Max depth: 20 m A string of narrow barrier reefs managed by the Great Barrier Reef Marine Park Authority. It is the only place in the world where divers can reliably interact with Dwarf Minke Whales.

60. Rowley Shoals

Australia | Liveaboard | Advanced | Sep–Dec | Unspoiled oceanic walls | Ave depth: 20 m | Max depth: 40 m A chain of three untouched coral atolls at the extreme edge of the continental shelf. The extreme offshore isolation ensures crystalline oceanic water and an unblemished ecosystem.

This band explores the fast-paced channels of the Maldives and the offshore pinnacles of the Andaman Sea.

61. Maaya Thila

Maldives | Liveaboard / Resort | Intermediate / Advanced | Year-round | Whitetip sharks hunting | Ave depth: 15 m | Max depth: 30 m A submerged pinnacle featuring a flat reef top. It is widely considered one of the premier night dives in the Maldives characterised by the frenetic hunting behaviours of whitetip reef sharks.

62. Fish Head

Maldives | Liveaboard / Resort | Advanced | Dec–Apr | High-density grey reef sharks | Ave depth: 20 m | Max depth: 35 m An isolated underwater pinnacle swept by very strong currents. It functions as a highly successful shark sanctuary harbouring resident grey reef sharks protected from finning.

63. Hanifaru Bay

Maldives | Day boat | Snorkel Only | May–Nov | Manta ray cyclone feeding | Ave depth: Surface | Max depth: 12 m A snorkel-only environment implemented to protect the animals. Cyclone-feeding aggregations of reef manta rays gather when tidal movements concentrate zooplankton in the bay.

64. Fotteyo Kandu

Maldives | Liveaboard | Advanced | Jan–May | Soft corals and pelagic schooling | Ave depth: 20 m | Max depth: 35 m A quintessential Maldivian channel dive featuring deep overhangs thickly decorated with yellow soft corals. Success here relies entirely on strong incoming tidal currents.

65. Nilandhoo Kandu

Maldives | Liveaboard | Advanced | Feb–Apr | Deep south shark aggregations | Ave depth: 20 m | Max depth: 35 m A remote deep-water channel dive in the southern Maldives. The distance from Male ensures lower diver traffic and healthier populations of eagle rays and reef sharks.

66. Hin Daeng and Hin Muang

Thailand | Day boat / Liveaboard | Advanced | Jan–Apr | Mantas and soft coral | Ave depth: 20 m | Max depth: 40 m Massive offshore limestone pinnacles rising from the deep seabed. They are visually defined by their namesake soft corals and are legally closed for half the year by the national park.

67. Shark Point and Anemone Reef

Thailand | Day boat | Beginner | Nov–Apr | Leopard sharks and anemones | Ave depth: 15 m | Max depth: 25 m Relatively shallow limestone outcrops resting on sandy sea beds. The sites serve as a primary training ground for Phuket's dive schools and feature resident leopard sharks.

68. Chumphon Pinnacle

Thailand | Day boat | Advanced | Jan–May | Whale sharks and dense schooling | Ave depth: 20 m | Max depth: 40 m A massive granite monolith in the Gulf of Thailand encrusted in anemones. It acts as a funnel for nutrient-rich currents attracting occasional whale sharks.

69. Sail Rock at night

Thailand | Day boat | Advanced | Confirmed at enquiry | Nocturnal encounters | Ave depth: 15 m | Max depth: 30 m Note: The research challenges this site's nocturnal standing. The available evidence does not establish what distinguishes Sail Rock at night from its daytime experience.

70. Racha Noi South Tip

Thailand | Day boat | Advanced / Tech | Nov–Apr | Manta cleaning station | Ave depth: 25 m | Max depth: 40 m Massive scattered granite boulders dropping to extreme depths. Oceanic currents converge here generating unpredictable down-currents and sustaining a vital manta cleaning station.

This group highlights high-adrenaline pelagic runs and historically significant maritime wrecks.

71. Sardine Run Wild Coast

South Africa | Day boat | Advanced | Jun–Jul | Baitballs and apex predators | Ave depth: 10 m | Max depth: 15 m An ephemeral pelagic phenomenon tracking the migration of the Southern African Pilchard. Divers look for baitballs herded by dolphins, bronze whaler sharks and Bryde's whales.

72. Guadalupe Island

Mexico | Liveaboard | Open Water | Closed | Great White Sharks | Ave depth: 10 m | Max depth: 15 m Note: The research removes this site from active consideration. The Mexican Government permanently prohibited all tourism activities including liveaboard diving within the Biosphere Reserve making the site legally impossible to visit.

73. Tiger Beach

Bahamas | Day boat / Liveaboard | Beginner | Nov–May | Tiger and lemon sharks | Ave depth: 8 m | Max depth: 10 m A flat featureless expanse of brilliant white sand in shallow water. The encounter relies on sustained baiting practices to draw massive female tiger sharks into close proximity.

74. Bimini Hammerhead Season

Bahamas | Day boat / Resort | Beginner | Dec–Apr | Great hammerheads | Ave depth: 10 m | Max depth: 15 m A shallow sandy seabed serving as a predictable overwintering ground for great hammerheads. Divemasters draw the sharks into close proximity using scented bait boxes.

75. Sha'ab Rumi

Sudan | Liveaboard | Advanced | Feb–May | Conshelf II and hammerheads | Ave depth: 25 m | Max depth: 40 m An untouched reef system featuring the submerged remains of Jacques Cousteau's 1963 underwater habitat. The deep plateaus serve as an aggregation point for scalloped hammerheads.

76. Umbria Wreck

Sudan | Liveaboard | Intermediate / Advanced | Year-round | Intact WWII munitions | Ave depth: 20 m | Max depth: 38 m A massive Italian passenger-cargo vessel resting on a sheltered reef. The holds contain an astonishing untouched collection of aerial bombs, Fiat cars and detonators.

77. Zabargad and Rocky Island

Egypt | Liveaboard | Beginner / Advanced | Oct–Nov | Deep walls and turtles | Ave depth: 20 m | Max depth: 40 m Remote uninhabited landmasses in the deep south of the Red Sea. They benefit immensely from geographical isolation avoiding the severe diver damage seen near the northern resorts.

78. Cape Town Kelp Forests

South Africa | Day boat / Shore | Advanced | Feb–May | Kelp forests and seals | Ave depth: 10 m | Max depth: 18 m Deep gullies and dense towering canopies of kelp in freezing Atlantic water. The main draw is close-quarter interactions with highly agile Cape fur seals.

79. Silfra Fissure

Iceland | Day tour | Drysuit Cert | Year-round | Tectonic plates and 100m visibility | Ave depth: 10 m | Max depth: 18 m A freshwater glacial rift situated directly on the boundary between two tectonic plates. The water is filtered through porous volcanic rock resulting in the clearest water on Earth.

80. Strytan

Iceland | Day boat | Advanced | Confirmed at enquiry | Hydrothermal chimney | Ave depth: Varies | Max depth: Varies Note: The research flags this site for data deficit. Seasonal operating status, permit requirements and operator viability need confirmation at enquiry.

This section covers the deep technical wrecks of the Pacific and extreme sinkhole drop-offs.

81. Blue Hole and the Bells

Egypt | Shore / Day-trip | Advanced | Mar–May | 120m sinkhole wall | Ave depth: 20 m | Max depth: 30 m A massive circular sinkhole plunging sheer to depths exceeding 120 m. The recreational drift dive along the outer coral wall is spectacular and safely avoids the lethal depths of the Arch.

82. Um El Faroud

Malta | Shore | Advanced | May–Oct | 115m scuttled tanker | Ave depth: 25 m | Max depth: 38 m A massive Libyan oil tanker sitting upright on a sandy seabed. It requires a gruelling surface swim from the shore but operates as a highly successful artificial reef.

83. Gozo Blue Hole

Malta | Shore | Beginner / Advanced | May–Oct | Inland sea and Azure Reef | Ave depth: 15 m | Max depth: 40 m A natural limestone sinkhole transitioning violently to a sheer wall. The debris field from the collapsed Azure Window has created new structural habitats for marine life.

84. Zenobia Wreck

Cyprus | Boat | Advanced | Confirmed at enquiry | 40m deep wreck | Ave depth: Varies | Max depth: 40 m Note: The research challenges this site due to a data deficit. The available evidence yields only its name and depth, leaving its standing unresolved.

85. Medes Islands

Spain | Day boat | Intermediate | May–Oct | Giant groupers | Ave depth: 15 m | Max depth: 30 m A strictly protected archipelago off the Costa Brava. The absolute prohibition on fishing has cultivated a thriving population of massive resident groupers showing no fear of divers.

86. Scapa Flow

UK | Charter boat | Advanced / Tech | May–Sep | WW1 German Fleet | Ave depth: 25 m | Max depth: 40 m A vast underwater fleet graveyard in the Orkney Islands. Divers explore the remaining metal leviathans of the German High Seas Fleet scuttled in 1919 in cold deep water.

87. SS President Coolidge

Vanuatu | Shore / Day boat | Advanced / Tech | May–Oct | Intact WW2 liner | Ave depth: 30 m | Max depth: 70 m A colossal luxury ocean liner converted into a troopship. The massive steel hull is heavily encrusted with coral and littered with jeeps and personal effects.

88. Million Dollar Point

Vanuatu | Shore | Beginner | May–Oct | WW2 vehicle dump | Ave depth: 5 m | Max depth: 15 m Note: The research categorises this as a historical novelty. It is an underwater junkyard where US forces dumped surplus equipment at the end of the war.

89. San Francisco Maru

Micronesia | Day boat / Liveaboard | Technical | Dec–Apr | WW2 warship at 64m | Ave depth: 45 m | Max depth: 64 m A preserved WWII Japanese warship resting deep within Truk Lagoon. The challenging depth profile requires strict normoxic trimix and decompression training for safe exploration.

90. USS Saratoga

Marshall Islands | Liveaboard | Technical | Feb–Sep | Nuclear-sunk carrier | Ave depth: 30 m | Max depth: 51 m A massive 277-metre aircraft carrier sunk during atomic bomb testing in 1946. It is one of the most remote dive sites on Earth demanding a 28-hour steam on an expedition vessel to reach the atoll.

The final band encompasses the extreme remote pinnacles of Oceania and vulnerable inland lakes.

91. Bradford and Inglis Shoals

Papua New Guinea | Resort / Liveaboard | Advanced | Apr–Dec | Silvertip sharks and coral | Ave depth: 24 m | Max depth: 40 m Isolated marine formations rising abruptly from pelagic depths in Kimbe Bay. The sites are renowned for high-voltage pelagic action in Kimbe Bay whose reefs hold an estimated 60% of all known Indo-Pacific coral species.

92. Milne Bay Muck Sites

Papua New Guinea | Resort / Liveaboard | Beginner / Intermediate | Oct–Mar | Mimic octopus and macro | Ave depth: 10 m | Max depth: 20 m The globally recognised birthplace of muck diving. Divers scan gentle volcanic black sand slopes to find rare cryptic species like the hairy frogfish and Spanish dancers.

93. Tufi's Fjords and Wrecks

Papua New Guinea | Resort | Advanced | Confirmed at enquiry | Tropical fjords | Ave depth: Varies | Max depth: Varies Note: The research flags this site for data deficit. Tufi's diving details need confirmation at enquiry because the available evidence is incomplete.

94. Mnemba Atoll

Tanzania | Day boat | Beginner / Advanced | Oct–Mar | Turtles and dolphins | Ave depth: 15 m | Max depth: 40 m A circular coral reef system off Zanzibar. Famous for green sea turtles and dolphins, it is also one of the busiest sites in the region; go early.

95. Aldabra Atoll

Seychelles | Expedition | Advanced | Confirmed at enquiry | Untouched ecosystem | Ave depth: Varies | Max depth: Varies Note: The extreme logistics restrict Aldabra exclusively to private expedition packages. It is a draconianly protected environment offering a window into pre-historic oceanic ecosystems.

96. Shark Ray Alley

Belize | Day boat | Snorkel | Confirmed at enquiry | Nurse sharks | Ave depth: Surface | Max depth: 3 m Note: The research challenges this site's standing. It is effectively a shallow-water high-volume snorkelling attraction where the natural behaviour of marine life is manipulated by artificial feeding.

97. Sangalaki

Indonesia | Day boat / Liveaboard | Beginner | Mar–Oct | Reef manta rays | Ave depth: 10 m | Max depth: 20 m A sand cay in the Derawan Archipelago. The local manta population feeds actively near the surface and is now protected by a new radar system following years of poaching.

98. Kakaban

Indonesia | Day boat / Liveaboard | Viewing from shore | Swimming closed | Golden jellyfish A raised limestone atoll containing a landlocked saltwater lake. A total swimming ban is in strict effect after sunscreen contamination caused the stingless jellyfish population to crash.

99. Crystal Bay

Indonesia | Day boat | Advanced | Aug–Oct | Mola mola | Ave depth: 20 m | Max depth: 40 m A deep narrow channel off Nusa Penida subjected to violent down-currents. Freezing upwellings draw the bizarre Oceanic Sunfish up the reef walls to specific cleaning stations.

100. Tulamben Coral Garden

Indonesia | Shore | Beginner | Apr–Dec | Macro and coral | Ave depth: 10 m | Max depth: 20 m A volcanic black sand slope adjacent to the USAT Liberty wreck in Bali. It provides a striking high-contrast backdrop for underwater macro photography in gentle conditions.

Not every famous site holds up to scrutiny. The research challenges several legendary names in the list because the evidence no longer supports their reputation.

Shark and Yolanda Reef in Egypt faces pressure from massive diver traffic from Sharm el-Sheikh. The research challenges Stingray City in the Cayman Islands and Shark Ray Alley in Belize because they are shallow manufactured petting zoos reliant entirely on artificial food provisioning.

Sail Rock at night in Thailand falls short because the independent data fails to distinguish it from the daytime experience. Australia's Cod Hole has suffered severe coral bleaching and the potato cod behaviour is heavily sanitised by historic feeding.

Guadalupe Island in Mexico is permanently closed to all tourism by government decree. Layang Layang in Malaysia is seasonal, arranged on request and confirmed at enquiry. Indonesia's Kakaban Lake is currently closed to swimming entirely because chemical contamination from tourists caused the stingless jellyfish to crash.

If you base your trip in Southeast Asia you have access to the absolute best diving on Earth without crossing an ocean.

Malaysia offers the dramatic oceanic drop-offs of Sipadan which serves as the ecological benchmark for the entire list. Indonesia dominates the top ten with Cape Kri in Raja Ampat and Batu Bolong in Komodo delivering impenetrable fish biomass. You can explore the volcanic sand muck slopes of Lembeh Strait or drift with the mantas in Manta Alley.

The Philippines offers the isolation of Tubbataha Reefs Natural Park and the dense macro environments of Anilao. Thailand offers exceptional seasonal pelagic visits at Richelieu Rock and the Similan Islands. The sheer density of premier sites in this single region is unmatched globally.

Barracuda Point is the dive people come back for. Getting there requires flying into Tawau airport on the east coast of Sabah. From there a road transfer takes you to Semporna to catch a speedboat out to Mabul or Kapalai.

Sabah Parks issues exactly 254 Sipadan permits a day. You secure a permit by booking a dive package with the right resort for a minimum number of nights. A guaranteed Sipadan permit is possible but which dates can be guaranteed depends entirely on the resort you choose. The team steers you to the combination that fits.

A day's diving at Sipadan gives you the chance to see the chevron barracuda column and dozens of turtles. The island is completely closed every November. You need an Advanced Open Water certification or equivalent to dive the island because the currents can be severe.

• The 10 best dive sites
• The 20 best dive sites
• The 50 best dive sites
• Sipadan
• Dive sites of Sabah and Malaysia
• Labuan wrecks
• Darvel Bay

Send your dates along with the names of everyone coming and your certification levels. The team comes back with what can be arranged to get you on the reef. Ask for next year's rates and current offers.