Whether you’re into stalactite symphonies, prehistoric shelters, or just love your trails dark and damp, these 10 U.S. underground wonders ( cited by fans on TripAdvisor and other sources) have you ...

With eyes wide open and headlamps beaming, students at the Cook Museum of Natural Science crept through man-made caves Tuesday wondering what would be next — stalactites or maybe even a bat's nest.

When you step inside, the ground disappears beneath your feet—this cave plunges a staggering 180 feet straight down. In this video, we explore one of the most dramatic vertical shafts known to ...

This playground offers the perfect energy release for young spelunkers before or after the main cave adventure. Photo credit: Nancy Anne They’re like walking encyclopedias of cave facts, but with ...

Trust me on this one. Even underground explorers need some above-ground playtime. This playground offers the perfect energy release for young spelunkers before or after the main cave adventure. Photo ...

3D scans reveal largest cave art in North America The larger-than-life composition is mostly invisible to the naked eye. Advanced technology helped uncover the stunning composition.

Archaeologists Were Exploring a Cave—and Found 100 Prehistoric Structures Experts believe the modified stalagmites are evidence of a planned occupation of the caves by ancient societies.

When visitors were shining their lights inside the ancient cave and making noise, a strange species of spider that lived inside began to vanish.

The “unusual” Nelson cave spider is an ancient species and New Zealand’s largest native spider with legs over 5 inches long, according to officials.