Yellowstone caldera and supervolcano.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...o_fullsize.jpg
Previously:
Volcano crater from above - GIF
Raging lava river - GIF
Lake Nyos limnic eruption disaster - GIF
Darvaza gas crater - photo
View from the summit of Mount Everest - GIF
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