This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate, sweeping the void with our dive lights. Fifty feet from the surface looms a pale haze, less ...

Our goal was to map one of the world’s unique ecosystems: underwater caves, aka “blue holes.” Their biogeochemistry creates hot spots for extremophile life-forms. They also contain fossils ...

One of the most famous underwater caves in the world, the Blue Hole is a giant sinkhole located off the coast of Belize. The deep blue water, surrounded by coral reefs, creates a striking contrast ...

Captain Henqua's Spoils is a treasure map found in Dawnshore, the first area of Avowed. This treasure map can be found on top ...

This spring the group published a report in the journal Science on its findings at a massive underwater cave on Mexico’s Yucatán Peninsula known as Hoyo Negro, or “black hole.” Beddows’ study of ...

I explain why generations A and Z are eating rotten meat, making fun of cave explorers, showing off their emergency contacts, and becoming very emotionally invested in an angler fish.

Narrator: There's a massive underwater sinkhole off ... That's when sea levels began to rise, and the cave flooded and collapsed, leaving behind the Blue Hole we see today. Researchers think ...

this blue channel contains underwater tunnels, caverns and rock formations. You'll likely spot marine life lining the coral wall at the surface of the hole. As you descend about 410 feet below sea ...

Cave Diver Memes, also known as Cave Divers Be Like or Cave Divers For No Reason At All, refers to a series of memes about people who explore caves and do ...