So I just heard a small news piece on Centralia, PA. If you didn't know, Centralia is where the underground mine fire has been burning for years. I learned a few interesting tidbits, though:
1) The fire has been burning since 1963.
2) The state has been buying houses there and demolishing them since the 80's.
3) There are only about a dozen people living in the town.
4) The fire could burn another 500 years!
So, there's your Pennsylvania history lesson for the day!