A former utopian healing center created by a huckster and built by derelicts.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

A collection of haunted objects and macabre oddities under one roof.

Europe's "only museum dedicated to the decapod" is full of quirky and absurdist displays, including one featuring the "famous" Giant Crab of Margate.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

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.

This secluded date farm can be reached only by following a bumpy, single-lane desert road.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

A kaleidoscopic warehouse-maze of handmade neon signs.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

Though tiki culture has gone in and out of fashion, the Tonga Hut has always been flying the flag in Los Angeles.

Its buzzing collection honors vibrator history.

An expansive book store, art gallery, and curio shop with wares ranging from tarot cards to novelty socks.

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

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

World's largest collection of serial killer artwork and other macabre exhibits.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

The world's only museum devoted to the wonders of fluorescence.

Japan's corrupt-mental-institution themed restaurant offers diners a chance to eat inside of filthy cells.

People from around the world visit the shrine of Japan’s legendarily loyal dog.

Inside the columbarium, thousands of colorful, high-tech Buddhas guard the ashes of the dead.