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.

From the deep ocean floor to vast underground caverns beneath our feet, these places challenge our understanding of the world.

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 ...

What started with a UVA caving club now has a Class of 2024 alumnus mapping rivers and crystal chambers in caves across the ...

The park was founded by a former U.S. Navy diver who envisioned a unique underwater spectacle that would bring people from ...

BOB MARSHALL WILDERNESS, Mont. — Montana calls itself home to the first and now second deepest cave in the continental United States. A team discovered Bobsled Cave in the Bob Marshall Wilderness, and ...

The origin story of Hells Canyon, North America's deepest river gorge, has long been unclear to scientists. But new research estimates it formed about 2.1 million years ago when a dramatic flood event ...