Just found this, quite nice

http://abandonedrediscovered.tumblr.com/

this isn't to bad either, prefer the top one
http://funzu.com/index.php/crazy-pics/brilliant-examples-of-photo-manipulation-art-30012010.html

unrelated but still
http://weburbanist.com/2008/02/27/7-abandoned-wonders-of-the-european-union-from-deserted-castles-retrofuturistic-factories/

more
http://www.dailymail.co.uk/news/article-1339536/Ghost-towns-China-Satellite-images-cities-lying-completely-deserted.html

abandoned
http://www.flickr.com/photos/kylie6470clanurbex/2760468369/in/set-72157612177446806/

and more...
http://www.darkroastedblend.com/2008/07/abandoned-castles-of-russian.html

...
http://www.panoramio.com/user/89123?photo_page=40&comment_page=41