The Door to Hell is certainly a fitting name for this underground cavern in Derweze, Turkmenistan, which is filled with natural gas. In 1971, the ground under the drilling rig collapsed, which resulted in a very large hole in the ground. In order to avoid poisonous gas emissions, the gas was burned. Geologists hoped the fire would subside in a few days, but it has been burning ever since. Thanks to flydime for posting jaw-dropping photo.
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