The Paris Catacombs
Paris
It’s already creepy enough to wander through 1.2 miles of dusty catacombs that have the disturbed bones of the 6 million Parisians that had their remains transferred there in the 18th century.
Even creepier are the various staircases that you’ll need to take to enter the catacombs, that’ll take you from the sunny beauty of Paris, to the dark depths of the ossuaries.