Escape the outside world on these eight wild treks through lava tubes, caverns, and abandoned tunnels across the U.S.

On Sunday’s episode of The Excerpt podcast: Hidden beneath Earth’s surface are caverns and pathways that hold the secrets of our planet’s very beginnings. Even after decades of exploration, there are ...

The discovery of more than 100 prehistoric structures in the Cova Dones cave in Spain makes it one of the most significant prehistoric underground sites in the world. Archaeologists found stalagmites ...

For outdoor enthusiasts, it can sometimes feel like everything has been done; every trail has been hiked, every mountain has been climbed. But what about diving below the surface? If you enjoy ...

Add Yahoo as a preferred source to see more of our stories on Google. Beneath the surface of an otherwise unassuming National Park, a labyrinth showcases hundreds of millions of years of geologic ...

There’s something about cave exploring that intimidates me. Perhaps it’s venturing below ground or the feeling of being enclosed, but the whole experience strikes me as a bit off-putting. That being ...

Vietnam's Son Doong, the world's largest cave passage, started its life millions of years ago as a crack the width of a piece of hair. Today, adventurers marvel at the surreal caverns in its depths.

While most people are preoccupied with what’s happening above ground in the Mount Shasta area, very few people think to venture underneath it. With towering mountains, epic hikes, cascading waterfalls ...

1 of 4 — Cave Point Country Park at Door County in Wisconsin 3 of 4 — The Visitor Center at Cave of the Mounds. Blue Mounds, WI, United States, May 4, 2023. Cave of the Mounds, a natural limestone ...

CNN — Exploring beneath the surface of other planets may be the key to determining whether life has ever existed outside of Earth. As other missions, including that of NASA's InSight lander, have ...

NASHVILLE, Tenn. (WKRN) – From a distance, it appears as a large crack in the rock on the Cumberland River. Up close, it’s a national historic landmark. The Demonbreun Cave was home to Nashville’s ...

Prehistoric humans intentionally modified stalagmites in the Cova Dones cave in Spain, forming over 100 structures—known as speleofacts—as a result. The recent archaeological find becomes one of the ...