The real Haunted Catacombs, Paris, France
As the great city of Paris grew in centuries past, it became more then just necessary to provide more space for the living. To do so, engineers and planners decided to move the mass of humanity least likely to protest: in this case, the dead. Millions of Parisian dead were quietly disinterred in one of the largest engineering feats in history and their remains were deposited along the walls of the chilly, dank passageways lying beneath the City of Light. They lie there to this day, in the eternal darkness, an Empire of the truly Dead.
