Salt mines
A lunar landscape in the middle of the Sahara: the salt mines of Tegguidda-n-Tessoum on the Hoggar road leading from the Algerian border to Agadéz in Niger. The saline water is led from the spring to salt-soaked sand pools. The sun does the rest of the work. As soon as the water has evaporated, the women collect the salt in large calabashes.
Niger -Tegguida-n-Tessoum - 1968