Best Diving & Snorkeling Destinations
The best dive sites on the planet — coral walls, pelagic encounters, and underwater worlds worth getting certified for.
The ocean covers 71% of the earth’s surface, and most travellers never see what’s under it. Getting a basic Open Water certification takes 3 - 4 days and costs - in most tropical destinations. It’s one of the best investments in travel you can make.
Even without certification, snorkelling at these sites puts you in contact with reef systems that are among the most biodiverse ecosystems on the planet. The sites below range from shallow reef gardens accessible to anyone with a mask to deep walls and current-swept channels that demand experience.
The Essentials#
The dive sites that appear on every list, because the marine life and conditions justify the reputation. Some are easy to reach, others require effort - but all of them deliver underwater experiences you won’t find anywhere else.
The largest reef system on earth. You could dive here for a year and not repeat a site. The outer reef from Cairns or Port Douglas has better visibility and healthier coral than the inner sections.
Coral bleaching is a real concern - some sections have recovered well, others haven’t. Ask local operators about current conditions. Liveaboards access the best sites; day boats cover the accessible ones.
The epicentre of marine biodiversity. Holds the world record for fish species counted on a single dive (374). Soft coral coverage is extraordinary - walls and pinnacles draped in every colour imaginable.
Getting there requires effort: fly to Sorong, then ferry or liveaboard. The remoteness is the protection - limited access means the reefs are in exceptional condition. Marine park fee of roughly applies.
Not a typical tropical reef dive - the water is cooler, the visibility variable, and the marine life is big. Marine iguanas, sea lions, hammerhead sharks, whale sharks, and mola molas share the water with you.
Advanced certification recommended for the best sites (Gordon Rocks, Darwin’s Arch). Liveaboards access the remote northern islands where the big schools congregate. Park fees are substantial but fund conservation.
A tiny island off Borneo’s east coast surrounded by a 600-metre wall dropping into the abyss. Barracuda tornados, bumphead parrotfish schools, hammerheads, and white-tip reef sharks are regular sightings.
Only 120 divers per day. Permits allocated to dive operators - book through a licensed centre in Semporna. Most divers stay on nearby Mabul Island, which has its own excellent macro diving.
Channel dives between atolls where the current funnels nutrients and attracts pelagics. Manta ray cleaning stations, whale shark encounters (especially South Ari Atoll), and coral gardens that start at ankle depth.
Liveaboards cover more ground than resort-based diving. The visibility can be extraordinary - 50 metres on a good day. Best conditions January - April on the east side, May - November on the west.
A collapsed limestone cave system visible from space - a near-perfect circle of deep blue surrounded by shallow reef. The dive itself drops to 40 metres past stalactites formed during the ice age when this was above water.
The Blue Hole is a one-dive experience. The surrounding atolls - Lighthouse Reef, Turneffe, Glover’s - offer better day-to-day diving with walls, sharks, and healthy coral. Belize’s barrier reef is the second largest in the world.
Famous for dragons on land, but the underwater terrain is equally impressive. Strong currents sweep nutrients through the channels, attracting manta rays, reef sharks, and dense schools of fish. The coral coverage is exceptional.
Current diving requires experience - this isn’t a beginner destination. Liveaboards from Labuan Bajo cover the best sites. The dragons are a bonus - morning land visits, afternoon dives.
Rock islands, blue corners, and some of the most pristine wall diving in the Pacific. Blue Corner - where you hook into the reef and watch sharks, Napoleon wrasse, and barracuda cruise past in the current - is consistently rated among the world’s best dives.
Jellyfish Lake (snorkelling among millions of stingless jellyfish) is the non-diving highlight. WWII wrecks add a historical dimension. Marine sanctuary since 2015.
Southeast Asia & Pacific#
The Coral Triangle - the waters between Indonesia, the Philippines, and Papua New Guinea - contains 76% of the world’s coral species. This is where divers come when they want to see everything. The region also offers the cheapest certification courses on earth - Ko Tao in Thailand and the Gili Islands in Indonesia have been minting new divers for decades.
The Pacific islands add extraordinary wall diving and pelagic encounters. Palau’s Blue Corner, Fiji’s soft coral capital, and French Polynesia’s shark dives are all world-class and increasingly accessible.
Raja Ampat
The world record holder for marine biodiversity. 1,700+ fish species, 600+ coral species, and soft coral coverage that makes every wall look like an underwater garden. Remote (fly to Sorong, then boat), expensive to reach, and worth the effort. Liveaboards cover the most ground. Best October - April.
Location: West Papua, Indonesia Level: Intermediate - Advanced Visibility: 15 - 25 m
Sipadan
A 600-metre wall dropping into the abyss off Borneo’s east coast. Barracuda tornados, bumphead parrotfish schools, hammerheads, and turtle traffic on every dive. Only 120 permits per day - book through licensed operators in Semporna. Nearby Mabul has world-class macro (nudibranch, frogfish, pygmy seahorses).
Location: Sabah, Malaysia Level: Intermediate Visibility: 20 - 40 m
Komodo
Current diving through channels that attract mantas, reef sharks, and dense schools. The coral coverage is exceptional and the variety of sites - walls, pinnacles, drift dives, muck diving - keeps a week-long trip interesting. Not for beginners; the currents are serious. Liveaboards from Labuan Bajo.
Location: Indonesia Level: Advanced Visibility: 10 - 25 m
Similan Islands
Granite boulders, swim-throughs, and some of Thailand’s healthiest coral. The Similans are a national park with limited access (open November - May), which keeps the reefs in good shape. Whale sharks visit occasionally. Liveaboards from Khao Lak are the standard access.
Location: Thailand Level: All levels Visibility: 15 - 30 m
Tubbataha Reef
A UNESCO-listed marine park in the middle of the Sulu Sea, accessible only by liveaboard from Puerto Princesa (10 - 12 hours). Pristine walls, hammerheads, mantas, and turtle nesting. Season is limited to March - June. Remote, expensive, and among the best-preserved reef systems in Southeast Asia.
Location: Philippines Level: Intermediate - Advanced Visibility: 20 - 40 m
Palau
Blue Corner is the headline - hook into the reef and watch sharks, Napoleon wrasse, and barracuda cruise past in the current. But Palau has 60+ sites including WWII wrecks, caverns, and Jellyfish Lake (snorkelling among millions of stingless jellyfish). Marine sanctuary since 2015.
Location: Palau Level: Intermediate - Advanced Visibility: 15 - 30 m
Where to Get Certified
Ko Tao, Thailand is the world’s cheapest and most popular place to get your Open Water - - 350 for the full PADI course, 3 - 4 days, warm water, and a backpacker town built around dive shops. Gili Trawangan, Indonesia is the laid-back alternative with similar prices and turtles on your certification dives. Moalboal, Philippines offers sardine runs and whale sharks within day-trip distance of your course. All three have dozens of schools competing on price and quality - check recent reviews and instructor ratios.
Level: Open Water - 350 Duration: 3 - 4 days Water temp: 28 - 30°C
Indian Ocean#
The Maldives is the Indian Ocean’s marquee dive destination, but the region’s diversity extends from the whale sharks of Mozambique to the wrecks of the Seychelles and the macro life off Mauritius. The water is warm year-round, the visibility is often exceptional, and the pelagic encounters - manta rays, whale sharks, hammerheads - are the main draw.
Maldives
Channel dives between atolls where current funnels nutrients and attracts pelagics. Manta ray cleaning stations (Hanifaru Bay is legendary), whale shark encounters in South Ari Atoll, and coral gardens that start at ankle depth off your resort. Liveaboards cover more ground than resort-based diving. Visibility can reach 50 metres.
Location: Maldives Level: All levels Best: Jan - Apr (east), May - Nov (west)
Ningaloo Reef
Western Australia’s answer to the Great Barrier Reef, and in many ways better - fewer visitors, whale shark swims (March - July), manta rays, humpback whales (August - October), and coral spawning. The reef is accessible directly from the beach in places. Exmouth is the base town.
Location: Western Australia Level: All levels Highlights: Whale sharks
Mozambique (Tofo Beach)
Whale sharks and manta rays are the headline - Tofo has some of the most reliable encounters in the world, especially October - March. The reef diving is solid, the infrastructure is basic, and the experience feels more like adventure diving than resort diving. Cheap by Indian Ocean standards.
Location: Mozambique Level: Intermediate Highlights: Whale sharks, mantas
Zanzibar & Mafia Island
Mafia Island Marine Park has whale shark aggregations October - March and healthy coral without Maldives prices. Zanzibar’s Mnemba Atoll is the more accessible option - turtles, dolphins, and reef fish in clear water. Budget-friendly diving with short boat rides.
Location: Tanzania Level: All levels Best: Oct - Mar
Where to Get Certified
Zanzibar offers affordable courses ( - 450) with warm water and Mnemba Atoll reef dives during certification. Mauritius has higher-end schools with small class sizes. The Maldives is possible but expensive - most people arrive already certified and use the budget for diving rather than training.
Level: Open Water - 500 Duration: 3 - 4 days Water temp: 27 - 30°C
The Americas#
The Americas offer everything from cenote cave diving in Mexico to big-animal encounters in the Galápagos. The Caribbean has reliable warm water and easy logistics. Central America adds volcano-backed reefs and freshwater caves. South America’s Galápagos is in a class of its own for pelagic diving.
Galápagos Islands
Not typical tropical diving - the water is cooler (16 - 24°C), the visibility variable, and the marine life is big. Marine iguanas graze on underwater rocks, sea lions play in the surge, and hammerhead schools at Darwin’s Arch number in the hundreds. Advanced certification recommended for the best sites. Liveaboards access the remote northern islands.
Location: Ecuador Level: Advanced Highlights: Hammerheads, whale sharks, iguanas
Cenotes (Yucatán)
Freshwater cave diving in collapsed limestone sinkholes. Crystal-clear visibility (often 100+ metres), stalactites, haloclines where fresh and salt water meet, and light beams piercing the darkness from overhead openings. Dos Ojos, Gran Cenote, and the Pit are the famous ones. Cavern diving (daylight visible) is accessible to Open Water divers; full cave penetration requires cave certification.
Location: Mexico Level: Open Water (cavern) to Cave cert Visibility: 50 - 100+ m
Belize Barrier Reef & Blue Hole
The second-largest barrier reef in the world. The Blue Hole - a collapsed cave system 318 metres across and 124 metres deep - is the one-dive bucket-list item. The surrounding atolls (Lighthouse, Turneffe, Glover’s) offer better day-to-day diving with walls, sharks, and healthy coral.
Location: Belize Level: Advanced (Blue Hole), All levels (reef) Visibility: 20 - 40 m
Cozumel
Drift diving in gin-clear water along the Mesoamerican Reef. The current does the work - you float along walls covered in sponges, sea fans, and coral, watching eagle rays and turtles glide past. Easy access from Cancún by ferry. One of the most accessible world-class dive destinations.
Location: Mexico Level: All levels Visibility: 25 - 40 m
Bonaire
The shore-diving capital of the Caribbean. Over 80 marked dive sites accessible directly from the beach - no boat needed. Drive to a yellow stone marker, gear up, walk in. The reef starts in waist-deep water and drops to walls within swimming distance. Ideal for self-sufficient divers who want to set their own schedule.
Location: Bonaire (Dutch Caribbean) Level: All levels Visibility: 20 - 30 m
Where to Get Certified
Utila, Honduras is Central America’s Ko Tao - cheap courses ( - 350), warm Caribbean water, and whale shark season (March - May) as a bonus. Cozumel, Mexico offers higher-end schools with drift diving on your certification dives. Taganga, Colombia is the budget option on the Caribbean coast. In the US, Key Largo, Florida puts you on the only living coral barrier reef in North America.
Level: Open Water - 500 Duration: 3 - 4 days Water temp: 26 - 30°C
Red Sea & Mediterranean#
The Red Sea is one of the great diving destinations that doesn’t require a long-haul flight from Europe. The coral is healthy, the visibility is reliably excellent, and the wreck diving - particularly the SS Thistlegorm - is world-class. Egypt’s Sharm el-Sheikh and Hurghada are the main hubs, with liveaboards reaching the more remote southern reefs.
Egyptian Red Sea
Ras Mohammed National Park (walls, pelagics), the Straits of Tiran (current diving with sharks), and the SS Thistlegorm (a WWII supply ship with motorcycles, trucks, and ammunition still in the hold). The Brothers Islands and Elphinstone Reef on the southern liveaboard route add hammerheads and oceanic whitetips. Warm water year-round, visibility routinely 30+ metres.
Location: Egypt Level: All levels to Advanced Visibility: 20 - 40 m
Dahab
The Blue Hole is the famous one - a 130-metre sinkhole with a reputation for depth-related fatalities that exceeds its appeal for recreational divers. But Dahab’s other sites - the Canyon, the Lighthouse, Eel Garden - are excellent, cheap, and shore-accessible. The backpacker vibe and Bedouin culture make it a distinctive base.
Location: Sinai, Egypt Level: All levels (avoid Blue Hole depth) Visibility: 20 - 30 m
Gozo
Malta’s smaller island has some of the best diving in the Mediterranean. The Inland Sea, Blue Hole (a different one), and cathedral-like caverns offer dramatic topography in clear water. Visibility is excellent by Med standards (20 - 40 m). Wrecks have been deliberately sunk to create artificial reefs. Cool water (15 - 25°C) - bring a thicker wetsuit.
Location: Malta Level: All levels Visibility: 20 - 40 m
Where to Get Certified
Dahab, Egypt is the Red Sea’s backpacker dive town - affordable courses ( - 400), shore-accessible sites, and excellent visibility. Sharm el-Sheikh has more polished schools and immediate access to Ras Mohammed. Gozo, Malta is the European option - English-speaking, clear water, and cavern dives on your course. Cooler water (a 5mm wetsuit rather than a shorty) but visibility that rivals the tropics.
Level: Open Water - 450 Duration: 3 - 4 days Water temp: 22 - 28°C