[BradyLS]

Like those coal-seam fires that dot the world.

[rxh4n1]

“Like those coal-seam fires that dot the world.”

Yep. Centralia PA fire burning since 1962.

[Paal Gulli]

"Like those coal-seam fires that dot the world."

There's one in New South Wales, Australia, that's been burning (at least) 5500 years.

https://en.wikipedia.org/wiki/Burning_Mountain#Coal_seam_fire

And of course the sun has been burning a bit longer than that.