Centralia is a borough and near-ghost town in Columbia County, Pennsylvania, United States. Its population has dwindled from more than 1,000 residents in 1980 to only 10 in 2010—a result of the coal mine fire which has been burning beneath the borough since 1962. Centralia, which is part of the Bloomsburg–Berwick metropolitan area, is the least-populated municipality in Pennsylvania. It is completely surrounded by Conyngham Township.
From Wikipedia: https://en.wikipedia.org/wiki/Centralia,_Pennsylvania