Caves

A natural bridge formed by limestone travertines in Armenia's Vorotan River Canyon.

This cave complex might provide a link between the Neolithic and the Classical Greek period.

The forest hums softly, like it’s alive and listening, outside the “Devil’s Kitchen.”

Get lost in the fantasy underworld of Thai serpents where wishes are granted

A cave-turned-memorial church marking the site where civilians were killed during an 1814 uprising.

An Ice Age rock grotto autographed by royalty.

While walking down Mazatlan's historic boardwalk, visitors are surprised to find their ocean view interrupted by a gateway to hell.

This cave column thousands of feet below the earth’s surface is rightly named for one of the most colorful park rangers in history.

This cave resembles the Star Wars Jedi master.

Location of a royal cave rave in the 1800s, now largely forgotten.

A naturally heated pool steaming in the wild heart of Kosciuszko National Park.

This historic 17th-century site once served as a secluded meditation retreat.

This ancient burial site is a fascinating reminder of Malta's prehistoric past.

This subterranean chapel is said to be where the Holy Family sought refuge before fleeing to Egypt.

The largest cave in Bosnia and Herzegovina is home to some the richest subterranean biodiversity in the world.

Prehistoric humans once used this sprawling lava tube network in the Saudi Arabian desert as shelter.

The rocky occasional overnight accommodations of a Connecticut folk legend.