This magnificent fiery crater was created in 1971 by Soviet geologists who, while drilling, stumbled upon a gas-rich cavern and decided to burn off the gas sipping through the cracks. It was expected to burn off in a few days but is still burning today. More info here.
Name: Gates of Hell
Lat, Long: 40.252624,58.43953
Location: Dashoguz Province, Turkmenistan