Thousand Kites has a prison mapping and image bank that (un)earths the presence of prisons in our communities using Google Earth videos and user generated content. Its goal is to provide bloggers, researchers, activists, and interested citizens access to often suppressed images of the U.S. prison industrial complex. You can see the results so far, and volunteer to help with this project by going to their website. Here's an example of one of their videos:
The videos become a part of Google Earth.