a close-up of a gurgling sulfur spring in the danakil depression

acidic activity adventure africa alien amazing average averaging beautiful below blistering brook burn close copper dallol danakil dangerous degrees deposits depression environments ethiopia explore fahrenheit fire green grey gurgling hike hostile hot hydrothermal landscape level lime mars most nature one orange planet ponds rough round scorch scorching sea sponge spongy spring stunning sulfur sunrise surface temperatures trek unforgiving white year yellow