It has a particular history, it was named the Door to Hell by locals, referring to the endless flames and boiling mud that can be found inside.
Originally a level surface, the site was identified by Soviet scientists in 1971 as an area that was believed to house a substantial oil field.
The engineers set up a drilling rig and operations to assess the quantity of oil available at the site. When they instead found gas, the ground beneath the drilling rig and camp collapsed into a wide crater and disappeared.
Scientists decided that the most efficient way to solve the problem would be to burn off the poisonous gases — by doing so, it was expected that all of the gas in the crater would be burnt off within days.
They estimated that the gas would burn out within a few weeks, but it has instead continued to burn for more than four decades