This community is a place to rhapsodize about the crypts, closes, tunnels, and other places that don't appear on postcards sold at Ye Olde London Tourist Trappe. Members can share their theories or advertise talks and walks. Feel free to recommend books, maps, and old tube stations. There are already other communities for London, underground London, Neil Gaiman, Londoners who like reading Neil Gaiman while underground, and so forth - hurrah! The more hidden discoveries, the better.
Just one request - people may read this at work, so please be nice (in terms of demeanor, words that would have gotten you in trouble with your stricter primary school teachers, grammar, etc.).