Cabo Pearce is a finger of lava rock that extends from Socorro Island. It's a fantastic place for encounters with the resident population of friendly dolphins, as well as the famous giant manta rays and a variety of sharks.

Cabo Pulmo National Park is one of the world's most outstanding examples of marine conservation. Once overfished, it's now a thriving marine park famous for the gigantic 'tornado' of thousands of jacks, as well as resident bull sharks and huge groupers.

The protected area around the iconic Cabo San Lucas arch offers several fantastic dive sites. Divers can interact with a colony of playful sea lions, witness the famous underwater 'sand falls', and enjoy the beautiful rocky reef topography.

Cades Reef is a large barrier reef and part of a protected marine park. It offers some of the best diving in Antigua, with beautiful coral gardens, swim-throughs, and a healthy population of nurse sharks and turtles.

The waters of Cala Gadir on Pantelleria island are a unique mix of history and geology. Divers can explore the remains of a 2,000-year-old Roman shipwreck with its cargo of amphorae, and then warm up in natural thermal springs in the bay.

Cala Ratjada on Mallorca is the gateway to the Llevant Peninsula Marine Reserve. The area offers a huge variety of diving, including spectacular sea caves, several wrecks, and beautiful, protected reefs teeming with life.

Calanggaman is a picture-perfect tropical island with a stunning white sand bar, often visited as a day trip from Malapascua. The diving features spectacular, deep walls with excellent visibility and a chance to see larger pelagics passing by.

California Dreaming is a beautiful soft coral reef site, offering a colorful change of pace from muck diving. The reef is covered in healthy soft corals and large sea fans, making it a great place to search for pygmy seahorses.

Cane Bay offers incredible shore diving, with a shallow reef that quickly drops off into a sheer wall plunging to thousands of feet. It's a spectacular and easy-to-access wall dive, famous for its healthy corals and population of reef sharks.

Cane Bay offers incredible shore diving, with a shallow reef that quickly drops off into a sheer wall plunging to thousands of feet. It's a spectacular and easy-to-access wall dive, famous for its healthy corals and population of reef sharks.

Cannibal Rock is a small seamount in southern Komodo, located in an area of cold-water upwellings. This nutrient-rich water fuels an explosion of life, making it one of the most biodiverse and critter-rich dive sites on the planet.

Off the coast of East Lombok, Gili Lawang and Gili Sulat offer more challenging diving with dramatic topography. 'The Canyons' is a series of underwater pinnacles and valleys where strong currents attract sharks, eagle rays, and large schools of fish.

Cape Kri currently holds the world record for the most fish species identified on a single dive (374!). The currents at the tip of this reef bring in an unbelievable amount of life, from tiny critters to huge schools of fish and patrolling sharks.

The Cape Verde archipelago offers a unique blend of Caribbean and Atlantic marine life. The volcanic islands have dramatic underwater landscapes with caves and numerous wrecks. It is also a major breeding ground for humpback whales.

The coastline of Capo Marrargiu is a protected area and home to one of Europe's largest colonies of griffon vultures. Underwater, the dramatic cliffs continue, offering spectacular and uncrowded wall dives with a huge amount of marine life.

Car Wrecks is a unique muck diving site where a collection of classic cars and other machinery were dumped to create an artificial reef. It's a fun and quirky dive, and a great spot for finding rare macro critters.

The Caribsea was a freighter sunk by the same U-boat as the famous U-352. The wreck is now very broken up and low-lying, but it is one of the most reliable places in the 'Graveyard of the Atlantic' to see huge schools of sand tiger sharks.

Carless Reef is a famous site near Hurghada, consisting of two large coral pinnacles. The reef is known for its incredible density of marine life and its large population of giant moray eels.

Carless Reef is a famous site near Hurghada, consisting of two large coral pinnacles. The reef is known for its incredible density of marine life and its large population of giant moray eels.

Carlisle Bay is a marine park that is home to six shipwrecks in close proximity, all in shallow, calm water. It's a fantastic dive for all levels, and the area is also a major hotspot for green sea turtles.

The Carnatic is a British steam and sail vessel that sank in 1869 while carrying a cargo of wine and gold. It's one of the oldest wrecks in the Red Sea, and its beautiful, coral-covered skeleton is a favorite among photographers.

The Carnatic is a British steam and sail vessel that sank in 1869 while carrying a cargo of wine and gold. It's one of the oldest wrecks in the Red Sea, and its beautiful, coral-covered skeleton is a favorite among photographers.

The Carnatic is a British steam and sail vessel that sank in 1869 while carrying a cargo of wine and gold. It's one of the oldest wrecks in the Red Sea, and its beautiful, coral-covered skeleton is a favorite among photographers.