Ghost towns are pretty intriguing. Basically, when a town becomes abandoned and is left standing or in ruin without inhabitants. Often they're simply abandoned due to socio-economic changes, but the ones where a natural disaster or some other fate have befallen them are the most interesting. Centralia in Pennsylvania is one such town, and was the inspiration behind the town in the movie Silent Hill, though sadly not because it's full of monsters, simply as a result of the underground fire which has been burning since the 60s and resulted in almost all of the residents (eventually) moving out. There's still a handful of folk living in Centralia, despite Government attempts to move them and the fact that the Post Office have revoked their post code