Catacombs are manmade underground cemeteries and religious spaces, some of which have survived thousands of years relatively intact. The Catacombs of Paris, for instance, holds the remains (mostly skulls) of 6 million people throughout miles and miles of underground tunnels. Other catacombs were left to age in dark silence for centuries, forgotten by history until someone happened to stumble upon them. We've done some digging of our own to bring you our list of the world's 10 creepiest catacombs.
Kirk via Wikipedia
Merlin via Wikipedia