In the United States, the term mole people (also called tunnel people or tunnel dwellers) is sometimes used to describe homeless people living under large cities in abandoned subway, railroad, flood, sewage tunnels, and heating shafts.
in Paris too, still today, there are people living in catacombs.
Although the ossuary comprises only a small section of the underground mines of Paris, Parisians often refer to the entire tunnel network as the catacombs.
Here’s a fantastic documentary about them from the 90s:
https://m.youtube.com/watch?v=9zxPozP4yoM
in Paris too, still today, there are people living in catacombs.