This naturally-sourced hot spring is now home to a clothing-optional resort.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A technicolor place of worship for Elevationists.

One person's lost luggage is another person's treasure.

The world's longest known cave system.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Where manatees are the snowbird vacationers in these balmy Florida springs.

San Francisco's newly reopened hands-on science museum.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A hotel and restaurant serving as the mecca of kitsch.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Hollowed out cedar log tubs set in an ancient towering forest.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A strange house built only at night, with rumored mystic inspiration.

This abandoned amusement park was built on a site with a dark history.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

Towering basalt columns, a creation of fire and ice.

Where America's first doomsday cult awaited the end of the world.

Mysterious rocks that ring musically when struck.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

A beautiful 62-acre Catholic shrine and botanical garden.