Most-visited and most-photographed slot canyon in the American Southwest.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

An exquisite tunnel of cascading flowers.

A kaleidoscopic warehouse-maze of handmade neon signs.

Rippling sand dunes frozen in the Arizona rock.

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The world's largest collection of fine-scale miniatures and one the nation's largest collections of antique toys.

Where else would a linchpin of post-colonial Native American cuisine anchor the menu but a museum?

An antique store houses the last operational diner from the defunct department store chain.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

Eyam took steps to quarantine themselves and keep the plague from spreading.

One of the world's largest collections of medieval religious art.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.