Looking for an adventure that’s cool (literally) and completely out of the ordinary? The United States is home to some of the ...

The Veryovkina Cave was the deepest-known cave on Earth, and experts stumbled upon it before daring to attempt a dangerous mapping of the depth.

(via MinuteEarth) Krubera Cave, one of our planet’s deepest known caves, extends 2200 meters into the earth – that’s a depth of nearly six Empire State Buildings. Or at least, that's as far down as ...

Ash Cave’s new historical marker reveals Indigenous artifacts, geological origins, and its role as a 19th-century gathering place.

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 ...