Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Abandoned hotel with adjacent lake and golf course.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Salt is slowly eating away this abandoned saltworks town in the desert.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

Dramatic river bend surrounds a natural red-rocked pedestal.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."

A sculpture of a flying hawk made from colorful car doors.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

These massive mitts are made of 30 tons of devotional bronze.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A home designed to be on the cutting edge of comfortable, low-cost living.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Once one of the largest producers of pig iron in the world.

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

An underground magnet for ever-changing street art.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.