Amos Rock is one of the premier wall dives in Tubbataha's North Atoll. The wall is covered in massive gorgonian sea fans and is a great place to see large pelagic fish, including sharks, tuna, and schools of mackerel.

Amphitheatre is a beautiful dive site in Tofo, a large pinnacle with a natural amphitheater shape and several fun swim-throughs. It's a great spot to see a variety of rays, including large blotched fantail rays.

This unique site features a series of shallow sea caves where ancient amphorae have been cemented into the ceiling by local divers, recreating the feel of an ancient wreck. It's a fun and interesting dive for all levels.

Amphorae Garden is a unique dive into ancient history. The site is a sloping reef where hundreds of ancient Roman amphorae (clay pots) lie scattered, the remains of an ancient shipwreck. A fascinating archaeological dive.

Anacapa is the closest of the Channel Islands to the mainland and is famous for its iconic Arch Rock. The diving is in beautiful, dense kelp forests that are home to a large and very playful colony of California sea lions.

Anau is a lagoon dive site in Bora Bora that is a reliable cleaning station for manta rays. Divers can observe these graceful giants as they hover over coral heads to be cleaned by smaller fish in the calm, protected waters of the lagoon.

Anchor Reef is a fantastic macro dive in St. Vincent, famous for its healthy reef and a large, historic anchor embedded in the coral. It's one of the best places on the island to find a variety of frogfish and other rare critters.

Anda, on the opposite side of Bohol from the main tourist areas, offers pristine and uncrowded diving. It features beautiful walls, a vast seagrass bed that is great for macro life, and a much quieter, more relaxed atmosphere.

The Andaman Islands are a remote Indian archipelago with pristine, untouched coral reefs and incredible biodiversity. The diving here is still relatively undeveloped, offering a sense of exploration on vibrant reefs, with a good chance of seeing manta rays.

Andiamo is a classic Misool wall dive. The site features a series of steep slopes and walls with numerous overhangs and crevices to explore. The walls are decorated with large, beautiful sea fans, which often hide pygmy seahorses.

Andiamo is a classic Misool wall dive. The site features a series of steep slopes and walls with numerous overhangs and crevices to explore. The walls are decorated with large, beautiful sea fans, which often hide pygmy seahorses.

Andrea I and II are two adjacent dive sites known for their incredible coral diversity and calm conditions. The reefs are packed with a huge variety of hard and soft corals, and it's a fantastic spot for finding seahorses.

Andros Island has the highest concentration of blue holes in the world. These are entrances to intricate cave systems, both inland and in the ocean. They offer a unique diving experience, from shallow, sunlit caverns to deep, technical cave exploration.

Anegada is a flat coral island, unlike the volcanic islands of the BVI. It is surrounded by the extensive Horseshoe Reef, which has claimed hundreds of ships over the centuries, making Anegada the premier destination in the BVI for wreck diving.

Anemone City in Ras Mohammed is a large, sloping reef that is covered in a huge number of anemones. It's a fantastic and easy dive, and a paradise for photographers wanting to capture classic shots of the resident clownfish.

Located very close to Shark Point, Anemone Reef is a submerged pinnacle that is completely covered in a dense carpet of sea anemones. It's a beautiful sight and is a haven for clownfish, as well as a large population of lionfish.

Ang Thong is a beautiful national marine park consisting of 42 limestone islands. While not a primary dive destination, it offers lovely, easy diving and snorkeling in sheltered bays, with healthy shallow coral reefs and beautiful topside scenery.

Angarosh, meaning 'Mother of Sharks', is a remote deep-sea pinnacle that lives up to its name. It's one of the most exciting and wild dives in the Sudanese Red Sea, famous for its schooling hammerheads and other large pelagic sharks.

Angel City is another of Bonaire's beautiful double reef systems. The two parallel reefs are separated by a sandy channel, and the site is named for the large number of French and Queen angelfish that are found here.

Angel Fish Reef is a beautiful and easy dive with a series of parallel coral canyons. As the name suggests, it's a fantastic place to see a variety of angelfish, as well as turtles and moray eels.

Angel's Window offers a break from the usual muck diving in Lembeh. It's a beautiful pinnacle with a large swim-through, or 'window', near the top. The pinnacle is covered in colorful soft corals and is a great spot for wide-angle photography.

Anilao is often called the birthplace of diving in the Philippines and is a world-renowned mecca for muck diving and macro underwater photography. Its black sand slopes are a treasure trove for rare and wonderful critters.

The Ann Ann is a large freighter that ran aground, and its bow still sticks out of the water, making it a famous landmark. The rest of the wreck lies on a steep slope and is a fantastic multi-level wreck dive.