Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

A long abandoned hospital building on the outskirts of NYC.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

An abandoned asylum where patients have been forgotten but their possessions remain.

The world's largest statue of Mao Zedong looks out over the city where he discovered Communism.

France's most famous cemetery, with some of its most curious tombs.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.

This demon atop the Notre-Dame de Paris looks utterly bored.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

An unusual number plate signifies the building's saucy past.

This mysterious wheel-cross is the tallest in Britain.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.