I find this fascinating. I am very claustrophobic, so it would be a no for me to go underground like that. I watched a film about the Paris catacombs -As Above, So Below (2014).
Hey, I saw that film as well. when we were down there, I asked the group I was with if any of them had seen the movie. But none of them had. I actually liked it. Especially the ending.
There's also one called Catacombs, but I haven't seen that one.