The Dragon Hole, an ocean sinkhole in the South China Sea, is a unique marine environment where oxygen rapidly disappears, making it inhospitable for most life forms.

In 2005, an experienced cave diver tried to recover the body of a diver who had vanished 10 years earlier - but the mission ...

A man lost his life in 2005 attempting to recover the body of 20-year-old fellow diver who vanished a decade earlier ...

I'm a severe claustrophobe. After getting trapped in a slide in my local McDonald's at five years old, I swore off all tight and dark spaces forever. So it's not entirely surprising that I couldn't ...

The Hranicka Abyss is at least 1,325 feet deep, and likely goes down further. — -- A team of explorers believe they have discovered the deepest known underwater cavern the world in eastern Czech ...

In 2005, a double tragedy unfolded at Bushman's Hole in South Africa when veteran diver Dave Shaw died attempting to recover ...