The only structure left with direct ties to the Salem witchcraft trials of 1692.

Try not to get slimed in Tribeca.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A toxic ghost town sitting atop a massive coal fire.

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

The legendary building that needed ghostly approval before being built.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

An eerie, derelict amusement park in Berlin.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

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

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

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

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

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

A terrific purveyor of natural history objects and curios.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.