Chott El Jerid, a flat dry salt lake, and automobile on highway between Tozeur and Kebili, Tunisia, North Africa, Africa

Salt lake of Sale de Porcus, aerial drone view, Sardinia, Italy, Mediterranean, Europe

Chott El Jerid, flat dry salt lake between Tozeur and Kebili, Tunisia, North Africa, Africa

Chott El Jerid, flat dry salt lake between Tozeur and Kebili, Tunisia, North Africa, Africa

Water of Lake Karum, visible through a hole in the salt flat, Danakil Depression, Ethiopia.

Tourists relax inside the water of Lake Karum, visible through a hole in the salt flat, Danakil Depression, Ethiopia.

Water of Lake Karum, visible through a hole in the salt flat, Danakil Depression, Ethiopia.

Water of Lake Karum, visible through a hole in the salt flat, Danakil Depression, Ethiopia.

Donkeys transport salt blocks from the salt mines, Assale Salt Lake, Lake Assale, Danakil Valley, Afar Region, Ethiopia, Africa

Sulphur sediments in the thermal area of Dallol, Danakil-Senke, Ethiopia, Africa

Dead camel thorns (Acacia erioloba) in front of sand dunes, Dead Vlei, Sossusvlei, Namib Desert, Namib-Naukluft National Park, Namibia, Africa

Sulphur sediments in the thermal area of Dallol, Danakil-Senke, Ethiopia, Africa