A man walks on sulphur and mineral salt formations near Dallol April 22, 2013.
A man walks with his camels through the Danakil Depression April 22, 2013.
Sulphur and mineral salt formations are seen near Dallol April 22, 2013.
At dawn, a camel caravan starts its journey to the Danakil Depression in northern Ethiopia April 22, 2013.
A camel herder and salt merchant holds rope in the Danakil Depression April 20, 2013.
Abdu Ibrahim Mohammed, a retired salt merchant, poses for a photograph close to his home in the town of Berahile in Afar, northern Ethiopia April 20, 2013.
A worker extracts salt from the desert in the Danakil Depression April 22, 2013.
A worker loads a camel with slabs of salt April 22, 2013.
A camel caravan carrying slabs of salt travels away from the Danakil Depression April 22, 2013.
A man prepares bars of salt to be sold in the main market of the city of Mekele April 24, 2013.
“Photographer Siegfried Modola traveled to document Ethiopia’s ancient salt trade in the Danakil Depression, one of the hottest and harshest environments on earth, with an average annual temperature of 94 degrees Fahrenheit (34.4 Celsius). For centuries, merchants have traveled there with caravans of camels to collect salt from the surface of the vast desert basin. The mineral is extracted and shaped into slabs, then loaded onto the animals before being transported back across the desert so that it can be sold around the country.