Cave diving combines the thrill of scuba diving and with the excitement of exploring a cave; it’s a challenging activity even for experienced explorers. At these four sites — some of the most popular ...

If one thing’s clear from Jill Heinerth’s breathtaking new memoir on her life as a professional cave diver, it’s that this unusual career path requires serious mettle. Self portrait under the tannic ...

Watch as divers locate fossils in blue holes—from crocodiles, owls, tortoises, birds, and more—species that are now extinct in the Bahamas and some of which have never been recorded in science before.

Extreme explorers attempt the deepest underwater body recovery in history. March 19, 2007 — -- Bushman's Hole, on the edge of the Kalahari Desert in South Africa, is one of the strangest places ...

I’ve gone diving and snorkeling all over the world. But there’s something about cenotes that never gets old. I’m obsessed. Each one is like its own secret swimming hole. Some look small on the outside ...

Every day, crowds flock to the Lukács Thermal Baths in Budapest, soaking in warm mineral-rich pools as yellow trams clatter along Frankel Leó Street. Most never suspect that just yards away, beneath ...

Mysterious and dangerous to explore, blue holes are underwater caves, formed as long as 300,000 years ago during the Ice Age. They are liquid time capsules, filled with fossils that offer clues to the ...