How the Soviets accidentally discovered the 'Gates of Hell'
Located in Turkmenistan’s Karakum desert, the Darvaza crater is a massive man-made sinkhole that has been burning methane gas for decades.
It has been said that it was intentionally set alight by Soviet authorities, hoping it would burn off in a matter of weeks. However, nearly 50 years later, the crater is still alight and its true origins are still shrouded in mystery.
Video by Adrian Hartrick and Dominika Ozynska