Abandoned Asylum - Abandoned asylums in New York and Massachusetts.
Castle on the Hill - Drawings and speculative text about Danvers State Hospital.
Danvers State Insane Asylum - Another Danvers site, featuring photos and history of the building.
Fallout UE - Studying urban decay in abandoned asylums, hospitals, factories and the like. Not a lot of words.
Institute of Urban Speleologic Studies and Archeology - In spite of the name, a very amateurish site featuring raw, unformatted directories of pictures.
Kirkbride Buildings - An impressive collection of material relating to the most common sort of asylum in New England.
Metropolitan State Hospital - An extremely impressive website featuring great photographs, a wonderful video and a thorough history of the building.
Modern Ruins - A collection of photos and write-ups about abandoned buildings (mostly asylums) around New England (currently down, hopefully temporarily).
Remnants of Abandoned Stations - A guide to abandoned transit tunnels and stations in Boston.
Urbanventure - Photographic excursions to an interesting variety of abandoned sites. Click the chalk lines for the background text.
Walking Into Spider Webs - Lovely colour and black and white photographs of decaying structures - including buildings and amusement parks - around New England.