In the 18th centuary, when the cemateries of Paris ran out of space for the dead, the city began to... ...dies in vast underground catacombs. These days Paris catacombs are no longer used. The city does offer...
https://www.neatorama.com/2009/02/05/exploring-the-catacombs-of-paris/
Exploring the Catacombs of Paris
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