castle
catacombs of paris
cave
fortifications
gallery
salle du chateau
salle du château
sculpture
towers
trespassing
underground quarry
Stone castle carved by cataphiles (urban cavers)
Catacombs of Paris (off-limit area), about 20 meters (60 feet) underground, under Paris city center.
This is a part of the 200 Km network of ancient tunnels not opened to the public, but regularly visited by trespassing urban cavers called "cataphiles". See more information in the description of the photo album.