Draped in a vibrant mix of soft corals and sponges, patrolled by an array of pelagic predators, home to some fish species found nowhere else on earth, and the resting place of world-class wrecks, the reefs and pinnacles of the Red Sea are the stuff of legend.

Why did UNESCO choose Cocos Island National Park as a World Heritage Site? It is the only island in the tropical eastern Pacific, and it provides critical marine habitats — deep waters pumped with nutrients from life-giving currents — for large pelagic fish, including the planet’s biggest — the whale shark — as well as schools of hammerhead sharks, yellowfin tuna and manta rays.

New wrecks have been sunk for divers to explore in the Bahamas, Bermuda and the Mid-Atlantic U.S.

How a WWII steamship loaded with supplies for British troops was turned into an undersea time capsule — and one of the most-dived wrecks in the world.

Nearest Point is a diverse, kaleidoscopic reef.

Drifting in the cobalt blue waters of Molasses Reef a diver notices something odd: On the underside of the Cheeca View (the dive boat he'd just been relaxing on), the letters HD had been painted in white on either side of the hull.

From muck diving to wall diving, beautiful North Sulawesi has a lot to offer beneath the surface. Photographer Christoph Weber catches it all in his latest video.

Sand Dollar Resort, located on Bonaire’s west coast, has the site for your next marine life mixer: Bari Reef.

Shark diving in Nassau offers the once-in-a-lifetime chance to have close encounters with Caribbean reef sharks — day or night.