Most extreme experience involving an inferno
The Door to Hell: Turkmenistan
Also known as the Gates of Hell or, less colorfully, the Darvaza crater. You won't find anything else like it in Central Asia (or anywhere else on Earth for that matter).
It was created more than 40 years ago when the ground collapsed in the desert during a Soviet drilling mishap.
Then scientists set the gas cavern on fire.
Decades later, it still burns like... let's just say the name is apt.