7. The Door to Hell (Turkmenistan)
The Door to Hell is situated in Derweze, a village in Turkmenistan located in the middle of the Karakum Desert. Derweze's 350 inhabitants are semi-nomadic and were disbanded by the President of Turkmenistan in 2004 after he stated that they were an 'unpleasant sight' to tourists.
Derweze is rich in natural gas, and the Door to Hell gas crater was a product of miscalculation. In 1971, Soviet geologists made a mistake when they accidentally tapped a cavern filled with natural gas while drilling. The ground collapsed, leaving a large hole 70 meters in diameter. As a safety precaution, geologists decided to burn off the gas and thereby prevent poisonous gas discharge. Much to their surprise, the fuel that they hoped to burn in one day is still burning today, earning it the name "The Door to Hell." This site has been burning for more than 40 years now and attracts thousands of brave visitors annually.