re: #541 albusteve

that’s all I know about it myself…have seen it on tv, but I dig all the tunnel and below ground stuff…wells and water, secret Chinese stuff under Deadwood or wherever…chambers and tunnels under castles…all that stuff is very interesting…but the Paris thing is really huge and to this day I think parts of it are really not too well mapped out

The Wiki article covers it pretty good.

en.wikipedia.org