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

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Towering basalt columns, a creation of fire and ice.

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

A layered tribute to the work of mosaicist Isaiah Zagar.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

World's first "penitentiary," meant to be humane, drove men insane.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Along a California highway is a kind of Jurassic Park made of metal.

Hike amid the palm trees that thrive among Southern California's Indio Hills.

A psychedelic labyrinth on the San Francisco bay.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

At this deceptively beautiful beach, nothing is what it seems.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

World's largest collection devoted to one fruit.

Explore 10 acres of environmental sculptures.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Rare collectibles from automated musical instruments to 250 unique automobiles.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.