Door to Hell in Antarctica - Watch more free videos
I don't know which of these two is scarier. I think the second, which is in Turkmenistan.
from wikipedia:
Derweze underground is naturally rich in natural gas. In 1971, during a drilling, geologists accidentally found an underground cavern filled with natural gas. The ground on which the drilling rig was placed collapsed, leaving a large gaping hole exposed with a diameter of about 50-100 meters. To avoid poisonous gases coming out of the hole, it was decided to let the gases burn. As of 2008, gases in the underground cavern are still burning without interruption. Locals have named the cavern The Door to Hell.
That's kind of cool and scary as hell all at once.
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