The Adolphus Busch is a large freighter that was sunk to create an artificial reef. It sits perfectly upright and is a fantastic wreck to explore, known for its resident population of giant goliath groupers.

The Aeolus was a large cable-laying ship that was sunk as an artificial reef. A hurricane broke it into three large sections, creating an interesting and varied dive site that is a major hotspot for sand tiger sharks.

Afkule is a large cave with a vertical chimney that offers an exciting and atmospheric dive for advanced divers. The dive starts with a descent through the chimney into the main cavern, which is beautifully lit by the blue of the entrance.

The Agamemnon Channel offers spectacular wall diving. The steep rock walls are completely covered in a dense carpet of white plumose anemones, creating a stunning visual. The walls are also home to a variety of large rockfish.

The Al Munassir is a large, former Royal Navy of Oman landing craft that was scuttled as an artificial reef. It sits perfectly upright and is a fantastic wreck for advanced divers to explore, now teeming with marine life.

Aldabra is a remote UNESCO World Heritage site and one of the most pristine ecosystems on Earth, home to giant tortoises. The diving is equally spectacular, with untouched reefs, huge fish populations, and a very healthy number of sharks.

The Alexandria was a fishing boat that now lies in a protected bay. It's a very easy and pretty wreck dive, sitting upright and now home to a good variety of fish life, including large schools of fusiliers.

The Alice B was a small freighter that was sunk as an artificial reef. The wreck sits upright in deep water, making for a great advanced dive, and has attracted a good amount of marine life.

Named for its large, mushroom-shaped star coral formations, Alice in Wonderland is a beautiful and whimsical dive site. It's a very easy and shallow dive, perfect for beginners and snorkelers.

Alice in Wonderland is a classic Bonaire double reef dive. A sandy channel separates two parallel reef systems, creating a valley to explore. It's a beautiful and easy shore dive, with a high chance of seeing turtles and rays in the channel.

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.

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.

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.

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.

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.

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.

Anse Chastanet offers one of the best and most beautiful shore dives in the Caribbean. The protected reef is incredibly healthy and diverse, sloping gently from the beach. It's a paradise for photographers and a great spot for night dives.