Urban Exploring. Recently: Sanatorio Popolare Cantonale di Piotta. Sinteranlage, Duisburg. Atomschutz Kurfürstendamm, Berlin (flash). (Previously.)
Abandoned places: A satellite facility. A drag strip. A sports arena. A factory. A highway. A school. Another factory. An industrial park. A missile site. A church. A brewery. And much more at Abandoned But Not Forgotten. (Warning: Web 0.2 site with very large photos of variable quality...)
Abandoned Memories is short on text but thick with photos. Even without captions for every picture, contextual clues can give us a disturbing idea of what life might have been like in the Wayne County Child Development Center (before it was abandoned, razed, and turned into a golf course). The rather-less-easy-to-navigate Northville-Tunnels.com also has photos and information.