Overflowing cemeteries and rampant disease forced 18th century Parisians to find a new place to inter the dead; the Paris Catacombs, a series of abandoned mining tunnels running 200 miles beneath the city. We cover the circumstances that led to the creation of this mass tomb, learn about the enthusiasts known as "cataphiles," the past and presence perils of this macabre landmark, and more.

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