Sơn Đoòng Cave is the world's largest cave in Vietnam, featuring a jungle, a river, and towering chambers that reach over 200 ...

Here’s the list of the oldest caves on Earth · Sudwala Caves · Jenolan Caves · Grotte de la Devèze · Fumane Cave · Movile ...

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 ...

June 15, 2006 — -- "Nightline" joined forces with writer Tim Zimmerman and filmmaker Gordon Hiles, who documented an ambitious dive to one of the world's deepest, most dangerous underwater caves.

India is home to some of the world’s most fascinating cave systems, offering a mix of natural wonders, ancient art, and ...