carved plate
catacombs of paris
cave
gallery
sign
sourds-muets
sours-muets
trespassing
underground quarry
Sous les Sours-Muets - Rue St Jacques.
Carved plate indicating location (rue Saint-Jacques, under the school for the mute and deaf)
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.