Mountain burns coal for 5,500 years.

[Psk]

A coal seam, 90' below Australia’s Burning Mountain's surface has been burning for 5,500 years, making it the longest continuous fire in the world. Ancient people used heat from rocky vents in the mountain to cook food and make tools. When  settlers dicovered the mountain in 1828, they assumed it was a volcano.

Some parts of the surface are 350 degrees, & it smells like sulfur. The path of the fire has left a barren and rocky trail, with no traces of life.

There actually are many of these underground fires across the planet, They’re a type of low-temperature, flameless combustion called a smoldering fire. They can be ignited by natural events such as lightning, though humans can set them accidentally or intentionally, by burning down forests.

There's also a mountain burning coal in Germany, that has been burning since about 1680.