Ethiopia, Danakil Depression, Boiling Surface of the Gaet'ale Pond

Gaet'ale Pond is a small hypersaline lake located in the Danakil Depression. It is placed over a hot spring of tectonic origin and has no apparent inlet or outlet streams. The salts in the water of Gaet'ale Pond are mainly composed by calcium chloride (CaCl2) and magnesium chloride (MgCl2). It also contains traces of Fe3+ that form a complex with Cl−, giving the water a characteristic yellow color.
The pond was generated after an earthquake on January 2005. The waters of the lake originate from a thermal spring located beneath it. For this reason its temperature (50–55 °C) is hotter than the environment.