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

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

A magical place that lets you play in and explore the world of Studio Ghibli.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Rippling sand dunes frozen in the Arizona rock.

A crumbling hospital from the 1850s on Roosevelt Island.

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

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

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

A kaleidoscopic warehouse-maze of handmade neon signs.

A psychedelic labyrinth on the San Francisco bay.

A terrific purveyor of natural history objects and curios.

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

A huge musical instrument played by the ocean.

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

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

A theater sits abandoned on Roosevelt Road, once majestic in splendor, now majestic in decay.

Once known as the Illinois Asylum for the Incurable Insane.

An abandoned meat mecca now serves as an excellent locale for urban exploration.