Japanese island famous for poison gas and fluffy bunnies.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Where Nor'easters go to die.

This former fascist summer camp was abandoned for decades.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

Siberian ghost town built by gulag prisoners.

This antique prison is a tourist attraction with a sordid past.

One of Ireland's most infamous prisons for rebels including men, women and children.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Human-made caves excavated to hide a secret society of wealthy pagans.

A 200-year-old prison that now houses a peculiar crime museum.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

WWII artifacts, including the building itself.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The middle finger of modernity.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Medieval torture techniques with a modern conscience.