44 years later, Centralia, PA is still on fire.

In 1962, workers set a heap of trash ablaze in an abandoned mine pit which was used as the borough’s landfill. The burning of excess trash was a common practice, yet at that particular time and place there existed a dangerous condition: an exposed vein of anthracite coal. The highly flammable mineral was unexpectedly ignited by the trash fire, prompting a quick effort to put it out. The flames on the surface were successfully extinguished, but unbeknownst to the fire fighters, the coal continued to burn underground. Over the following weeks it rapidly migrated into the surrounding coal mines and beneath the town, causing great concern. […] In 1969 — seven years after the fire was started — a more involved effort was made to contain the fire using trenches and clay seals, but the attempt was met with failure. In the 1970s, concerns over the severity of the extensive subterranean fire were stirred when a gas station owner noticed that the contents of his underground fuel storage tank seemed hot, so he measured the gasoline’s temperature, and found it to be a troubling 180 degrees Fahrenheit. […] The fire still burns today beneath about four hundred acres of surface land, and it’s still growing. There is enough coal in the eight-mile vein to feed the fire for up to two hundred and fifty years, but it may burn itself out in as few as one hundred years.

It’s not a total loss, though. Centralia is the inspiration for the Silent Hill game and movie franchise.