One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

A mad mystery man who led Canadian mounties on a 150-mile wilderness chase is still buried with his secrets intact.

Human-made caves excavated to hide a secret society of wealthy pagans.

Home to Hollywood history and a very special salt crystal.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Repository for more than 22 million pickled specimens.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

The UK's oldest theme park slowly slips away.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A hands-off space for graffiti artists to hone and display their skills.

Home of mutant livestock.

A historic house left in "dramatic still life."