Caves

Every half hour, the flow of this unusual spring cycles between a rush of water and barely a trickle.

Generations of rockhounds got their start at this beloved, historic mine.

The largest cave on the island of Menorca was likely the site of Iron Age rites and rituals.

Take an underground boat ride through a former hydraulic raceway that was built in the late 19th century.

A small cave hidden deep within the Jenny Jump State Forest.

This small cave in the center of Isla Colon doubles as a sanctuary.

A natural swimming pool in the middle of the Carite Forest.

Drift through underground caves on a tube.

The short hike is worth the stunning views and crystal blue waters of a secluded beach.

It's believed a local adventurer spent 50 years living inside this cave.

Near this coastal cave stands a small memorial to the hermit who made it his home for three decades.

This cave was once thought to be a hiding place for the devil.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

A massive cave once a secret military base is now home to thousands of bats.