The Door To Hell‘ may sound like a science fiction-horror movie, but it’s not. It is a real place in Turkmenistan.

Hank Green of SciShow explains that in the 1970’s, Soviet scientists found an amazing depot of natural gas, but while attempting to retrieve it accidentally caused the ground to collapse.

The scientists realized it would be better to set the now free methane on fire than let the dangerous, combustible gas vent into the environment. 

They thought the gas would be burn up in a few weeks, but 42 years later the crater is still burning.