North Brother Island has cool birdsand old buildings. It used to be a quarantine zone for victims of infectious disease. [more inside]
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.
There have been a number of urban exploration or modern ruins photography posts here over the years, but I couldn't find any that linked to my new favorite modern ruin site, opacity.us. With 85 galleries of subjects as gorgeous as Bannerman's Arsenal and as haunting as the Verden Psychiatric Hospital, it's a treasure trove of entropy on film.
Baltimore ghosts: a methodical, obsessive and beautiful (the photos, anyway) addition to the modern ruins genre - the essays on the Lutheran Hospital and the Bay Shore Shuttle are especially interesting.
Mustard Gas Party :: Photographs of Modern Ruins
The most serious charge which can be brought against New England is not Puritanism but February. -- J W Krutch
New England Ruins :: Photographs