You would like the show "Cities of the Underworld" on The History Channel... if you don't watch it already
My exploration is a little different...
My hometown (teeny tiny place) was victim to a cholera plague in the mid 1830's. In an attempt to distance themselves from the disease... the entire town center moved several miles west, where it is today.
My extent of exploration is wandering around in the woods directly east of our town... finding old bridges, structures/foundations, cemetaries etc.
Several years ago, I found the original town cemetary in the middle of the woods (really spooky looking too... it was awesome!). This cemetary is now maintained by the local government...
Not exactly "urban" but fun none the less
