Cono de Arita, a 200-meter conical hill in northwestern Argentina.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...a_fullsize.jpg



Previously:

Volcano crater from above - GIF
Lake Nyos limnic eruption disaster - GIF
Geologist collecting lava samples from an active volcano - GIF
Darvaza gas crater - photo
Volcano eruption greatest April Fools prank ever - photo