(Sorry, Mimi) This post on WebUrbanist gives a short write-up of several abandoned towns across the world. It's not very comprehensive, and doesn't give a lot of information or pictures, but hey, that's what Wikipedia is for, right? (Be sure to check out Kowloon Walled City, Hong Kong, pictured above.) Thanks to Hipstercrite for bringing WebUrbanist to my attention. EDIT: Also check out the Sanzhi, Taiwan, UFO Houses on Flickr.