The Darvaza gas crater, also known as the Door to Hell or Gates of Hell, officially the Shining of Karakum, is a burning natural gas field collapsed into a cavern near Darvaza, Turkmenistan. Hundreds of natural gas fires illuminate the floor and rim of the crater. The crater has been burning since 1971. Drilling punctured a natural-gas cavern, the cavern's roof collapsed, and some sources state that engineers ignited the crater to prevent poisonous gases from spreading.