"There's nothing there," and other lies the KGB told us.

A curious collection of locks and keys.

Dolls of all shapes and sizes display the eras of femininity in this spooky and beautiful collection.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Long-secret natural history museum, featuring the skull of a "Terror Bird."

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

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

A museum of carnival attractions where you are invited to ride the rides.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

A museum dedicated to a Cold War era sausage.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

One of the oldest libraries in England, and one of the last of the great medieval chained collections.