Doors to Hell
Located in Derweze, Ahal Province, Turkmenistan. It was actually created by Soviet scientists (somewhat accidentally of course). The site was first believed to be an oil site back in 1971. When they started to drill they happily discovered an abundance of natural gas, of which they worked to store. Unfortunately, the site collapsed (don’t worry, no one died though). Large pockets of methane gas was released, which proved to become an environmental problem for nearby villages. Afraid the sites would release even more poisonous gas, they tried to burn it off, thinking it would take at most a few weeks to burn out.