[night862]

Almost all of the catacombs is closed. The tourism portion is like a few hundred feet. I have a couple of interesting links for you from UNDERGROUND KONTROL

Here's a guided tour of the closed portion by a knowledgable enthusiast: https://youtu.be/O3ufzGxfW6Y

here's a short (20 min) French language mini-documentary about the pastime of people who go to the catacombs. https://youtu.be/nRISC0cJwMU

It documents a real project they undertook to uncover and infiltrate the location of the WWII Nazi bunker for the purposes of producing a Rave. The rave had electricity that they were able to secretly install by jack hammering through a meter thick concrete wall.