The 18 lakes is all that remains today.
The almost-year-round northeast winds and cloudless skies make for very high evaporation rates.
A NASA image taken on November 14, 2009, by the crew of the ISS.
The lakes are divided into two groups, 40km apart.
This is a hyper saline lake which supports only algae and a few other micro-organisms.
The lakes of Ounianga form as exceptional natural landscape of great beauty with striking colours and shapes.
Photo credit
Sources:NASA,African World Heritage