- This area has 18 lakes of various sizes, depths and colors.
- These permanent lakes in a desert result from an aquifer and a complex hydrological system that is not fully understood.
- Some of the lakes have blue, green or reddish water, which reflects their chemical composition.
- About a third of the surface of the lakes is covered with green floating reed carpets that contrast with the water.
ANSWER Lakes of Ounianga, northeastern Chad