http://www.flickr.com/groups/urbanexploration/
This Flickr group is for any urban explorers to post their pictures to share on the web. The site features over 160,000 pictures, as well as discussion sections, and a map of where these s0me special sites are located. For anyone interested in seeing more abandoned ruins or posting their own pictures of their explorations, this is the place to go.
Abandoned Exploring 