UNESCO marine sites you can scuba dive: a diver's guide

20 July 2026

Scalloped hammerheads at Cocos Island. Photo: Barry Peters, CC BY 2.0, via Wikimedia Commons.

Some of the greatest dives on earth are also the most protected. UNESCO World Heritage marine sites are the ocean's crown jewels, chosen for wildlife and reefs found nowhere else, and many of them are open to divers. This guide is how to plan a trip to them: what you dive, how to get there, when to go, and the experience each one asks for.

How to use this guide

Most of these sites are remote, and several can only be reached by liveaboard. Match the site to the animal you want, the season, and your level. Two of them, the Galapagos and Komodo, you can compare and plan on DiveScanner today.

The sites

Galapagos Islands, Ecuador

World Heritage since 1978, one of the first. The remote northern islands of Darwin and Wolf, reached only by liveaboard, hold schools of scalloped hammerheads year round and whale sharks from July to November. Cool water, strong current, an advanced trip and a bucket list one.

• What you dive: hammerhead schools, whale sharks, Galapagos sharks, mantas, mola mola.
• Getting there: liveaboard from San Cristobal or Baltra, flying via mainland Ecuador.
• Best season: warm and calm December to May, whale sharks July to November.
• Level: advanced.

Compare Galapagos liveaboards on DiveScanner.

Komodo National Park, Indonesia

World Heritage since 1991, famous above water for the dragons and below it for mantas and current swept reefs. The southern sites feed mantas year round, the central channels pull big fish through fast water.

• What you dive: reef and oceanic mantas, sharks, huge fish schools, macro.
• Getting there: liveaboard or day boats from Labuan Bajo.
• Best season: April to November, the dry season.
• Level: advanced for the current sites, easier reefs too.

Compare Indonesia liveaboards, including Komodo, on DiveScanner.

Tubbataha Reefs, Philippines

World Heritage since 1993, a marine park in the middle of the Sulu Sea, reachable only by liveaboard and only for a short season. Sheer walls, reef sharks, turtles and untouched coral.

• What you dive: reef and grey sharks, walls, turtles, big schools.
• Getting there: liveaboard from Puerto Princesa, Palawan.
• Best season: mid March to mid June only.
• Level: advanced, open water sites with current.

Sanganeb and Dungonab Bay, Sudan

World Heritage since 2016, the wild, quiet side of the Red Sea. Pristine reefs, sharks and few other boats, reached by liveaboard from Port Sudan.

• What you dive: hammerheads, grey reef sharks, walls, manta and dugong in Dungonab Bay.
• Getting there: liveaboard from Port Sudan.
• Best season: spring and autumn, diveable much of the year.
• Level: advanced.

Revillagigedo, Mexico (Socorro)

World Heritage since 2016, often called the Galapagos of Mexico. Giant oceanic mantas that seek out divers, plus sharks and dolphins, reached by liveaboard across open ocean.

• What you dive: giant oceanic mantas, hammerheads, silky and Galapagos sharks, dolphins.
• Getting there: liveaboard from Cabo San Lucas, about a day at sea.
• Best season: November to May.
• Level: advanced, blue water and current.

Compare Socorro liveaboards on DiveScanner. For more on the giants here, read reef vs oceanic mantas.

Cocos Island, Costa Rica

World Heritage since 1997, a remote island famous for walls of hammerheads. Liveaboard only, a long crossing, and one of the great big animal dives on the planet.

• What you dive: scalloped hammerhead schools, whitetips, tiger and Galapagos sharks.
• Getting there: liveaboard from Puntarenas, about 36 hours at sea.
• Best season: rainy season June to November for the biggest hammerhead schools.
• Level: advanced.

Belize Barrier Reef, Belize

World Heritage since 1996, the largest reef in the northern hemisphere, home to the Great Blue Hole. Atolls, walls and easy reefs, reachable by resort or liveaboard.

The Great Blue Hole, Belize. Photo: The TerraMar Project, CC BY 2.0, via Wikimedia Commons.

• What you dive: the Great Blue Hole, walls, reef sharks, turtles, atolls.
• Getting there: resorts and liveaboards from Belize City.
• Best season: year round, best April to June.
• Level: the Blue Hole is a deep dive for Advanced, the reefs suit all levels.

Great Barrier Reef, Australia

World Heritage since 1981, the largest reef system on earth. The outer Ribbon Reefs and the Cod Hole are reached by liveaboard, with dwarf minke whales in winter.

• What you dive: the Cod Hole, coral gardens, reef sharks, minke whales in June and July.
• Getting there: liveaboards from Cairns and Port Douglas.
• Best season: June to November, minke whales June to July.
• Level: all levels, some outer sites for Advanced.

Rock Islands Southern Lagoon, Palau

World Heritage since 2012. Blue Corner, shark filled channels, WWII wrecks and the famous Jellyfish Lake.

A reef shark at Blue Corner, Palau. Photo: Matt Kieffer, CC BY-SA 2.0, via Wikimedia Commons.

• What you dive: sharks at Blue Corner, mantas, walls, wrecks, Jellyfish Lake.
• Getting there: resorts and day boats from Koror, some liveaboards.
• Best season: year round, best November to May.
• Level: Advanced for the current sites.

Ningaloo Coast, Australia

World Heritage since 2011, a fringing reef where whale sharks gather close to shore. More snorkel than deep dive for the whale sharks, with good reef diving too.

• What you dive: whale sharks, mantas, reef, humpback whales in season.
• Getting there: from Exmouth and Coral Bay, day trips.
• Best season: whale sharks March to July.
• Level: all levels, whale sharks are usually a snorkel.

Why these places are protected

World Heritage status is not a marketing badge. It means the site holds wildlife or reefs of value to the whole planet, and it comes with real protection: patrols, limits and rules that keep the sharks, mantas and coral there. Diving them well, and choosing operators who respect the rules, is part of keeping them.

Plan your trip

Two of these, the Galapagos and Komodo in Indonesia, you can compare and plan on DiveScanner now, with more destinations coming. Pick your destination and month, and compare liveaboards cheapest first. For the animals these sites are famous for, see where to see whale sharks and where to dive with tiger sharks.

FAQ

Which UNESCO marine sites can you scuba dive?

Many, including the Galapagos, Komodo, Tubbataha, Sudan's Sanganeb, Revillagigedo in Mexico, Cocos Island, the Belize Barrier Reef, the Great Barrier Reef, Palau and Ningaloo.

Which UNESCO dive site is best for hammerheads?

The Galapagos and Cocos Island for schooling scalloped hammerheads, both reached by liveaboard.

Which UNESCO sites need a liveaboard?

The Galapagos northern islands, Tubbataha, Sudan, Revillagigedo and Cocos Island are liveaboard only.

Why are these sites protected?

UNESCO World Heritage status recognises wildlife and reefs of global value and brings real protection and rules that keep them healthy.