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Guide to Diving Oahu's Best Wrecks and Reefs

The weather can't be beat, and the water is crystal-clear. Hawaii's third-largest island is home to some of the world's best diving, offering something for every type of diver.

Video: Diving in a Sacred Maya Cave

Scuba diving in a cenote near Chichén Itzá, an underwater archaeologist explores an otherworld strewn with Maya offerings, from pottery to human bones.

Video: Gigantic School of Mobula Rays

Watch mobula rays — aka devil rays — feeding and flying off Baja California, Mexico, in what National Geographic says could be the largest school ever filmed.

What It's Like to Dive a Titan Missile Silo

Diving a Titan I missile silo in Washington transports a scuba diver back to 1965.

Secret Scuba Spot: East Greenland

An Arctic dive trip of a lifetime: Bring your drysuit and sense of adventure to East Greenland and encounter humpbacks, orcas, fin whales and more!