One such drop is known as Fantastic Pit within Ellison’s Cave. It is the deepest freefall pit in America, plunging down vertically for 179 meters (586 feet). Within the same system is Incredible ...

the second deepest cave in North America. He’s the president of the Cave Conservancy of Hawaii, a nonprofit trust that has been buying up land in and around Ocean View to preserve the tunnels ...

A team of NASA-funded University of Northern Iowa researchers is exploring some of the deepest caves in the United States to ...

Also known as Voronya Cave, Krubera is the second-deepest known cave on Earth - it was previously believed to be the deepest cave in the world before this honour was switched to its neighbour ...

Two decades later, I organized a series of expeditions to investigate new deep caves, using dye traces in cave streams to probe Arabika’s potential depth. In 2001 a team led by Ukrainian Yuri ...

The 40-year-old New Jersey native was trapped in the Morca cave — the third-deepest cave in Turkey — for over a week after he became ill while on an expedition when he experienced ...

Mark Dickey, 40, had begun his expedition into Morca Sinkhole cave — the third-deepest cave in Turkey, with a depth of 4,186 feet — on Saturday when he experienced gastrointestinal bleeding ...