Don't know if this was posted yet, but here goes anyway. For some reason the page seems to jump to the bottom when loaded. Spotted @ io9.
http://www.environmentalgraffiti.com/anthropology-and-history/news-salt-city-1200-feet-beneath-detroitNow that might be an interesting place to have a party. Or just to go spelunking to.
Jussi Lehtonen "Metaprogram yourself."