Caves

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.

Hidden in a cave on a small Taiwanese island, a stalagmite reported to look like the bodhisattva Guanyin.

Local legend says a monk brought Christianity to Bornholm through his sermons in a cave inside this free-standing rock.

This cave in the heart of La Mancha is full of esoteric secrets.

Legend has it these caves were created by a deity called Ogba, who is said to live inside the winding subterranean caverns.

A museum dedicated to the centuries-old cave dwellings that housed marginalized communities on the outskirts of the former capital of Muslim Spain.

A haunted slate mine turned concert hall and a hidden fairy garden.

The biggest cave system in the Arabian Peninsula is home to a rare variety of blind fish.

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.

In the Ozarks, a waterfall shoots out from a glorious hole.

The cave of a 12th-century hermit is still visited and venerated today.

A large wave-cut shelter, a major archeological site, overlooks the dry basin of Winnemucca Lake.