I have Heather Champ’s FlickrBlog bloglined (as do 1400+ other blogliners).
Champ uses the blog to point out interesting pics on Flickr.
One of her posts for 29 Dec 2005 is a click to A Flickr Sampling, which has interesting pics of abandoned cars, stuffed chairs, dustydead pianos and stuff.
What I found even more interesting were her links to the spots where she’d found these pics: urban explorers, RUSTY and CRUSTY, clutter, litter, mess and muddle and Abandoned.
Interest groups, anyone?
Flickr has a bunch of special-interest groups like these, including this one focused on San Francisco Graffiti.