An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The whiskey producer's archives includes a historical list of infractions committed by and associated penalties exacted upon employees.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

A crumbling hospital from the 1850s on Roosevelt Island.

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

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

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

A psychedelic labyrinth on the San Francisco bay.

A terrific purveyor of natural history objects and curios.

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

The Vermont grave of a 4,000-year-old mummy prince.

A tomb with a window to ensure the interred wasn't buried alive.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

A cave dug by a man directed by ghosts to find pirate treasure.

A defunct all-girls college which may be the resting place of H.P. Lovecraft's real-life Necronomicon.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

An eccentric inventor's castle home with its own indoor weather system.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

The bears may be gone, but their old cages can still be found.