Great photo set on Environmental Graffiti about abandoned prisons:
Around the world there are many abandoned prisons, once cages for people – some criminals, some political prisoners. Many disused prisons have been left to rot and decay, while a few have been demolished. No longer places for the incarcerated, many of these derelict landscapes are now the realms of urban explorers who document the abandonment and degradation of the former correctional institutions in pictures.
12 Creepiest Abandoned Prisons on Earth [EnvGraf] [Thanks, Dad!]