Ah, the wonders of Urban Exploration and its rediscovery of buildings discarded and forgotten by society. Might want to check out
UER for a massive catalog of locations around the world as well as photos and documentation of visits to the sites. And
for those in the UK I suggest
Subterranea Britannica with many sites leftover from various
european wars. Unfortunately some of the older sites are going black as the hosting and/or domains expire, such as Subciety and The Midnight Society.
