The Paris Catacombs are underground ossuaries which hold the skeletal remains of over 6 million deceased Parisians. The Paris Catacombs (the ossuary that is open to the public) occupy a tiny part of the former stone quarries of Paris; only 1.7km is accessible to the public. What locals call the “Catacombs” are actually a massive network of about 300km long (!!!) underground tunnels and galleries which lie underneath Paris (below the metro and the sewer system). And those former quarries are a massive playground for the Cataphiles!
The Catacombs of Paris : An Underground City of the Dead
