German plans for re-engineering Africa

Africa's Central Lake planned by german architect Herman Sörgel in 1935. Basically the plan was to totally reconfigure the interior of Africa by creating a series of huge inland seas. His plan was to dam the Congo River where it passes through a string of deep, narrow gorges after it merges with one of its tributaries, the Kwa River. It would create a lake 350,000 square miles in area - larger than the areas of California, Nevada and Oregon combined.

Once the lake filled, it would be forced to overflow from another one of its tributaries, the Ubangi, into the Shari River which is one of the feeders for the present day Lake Chad.
Lake Chad would swell to the dimensions it was thought to have had over 10,000 years ago, spreading across the Ahaggar plateau. A river would then be created that would lead through Algeria, turn east into Tunisia and then eventually empty into the Mediterranean Sea at the Gulf of Gabes. This river could made navigable allowing ships to directly access the interior of Africa.

Source: https://amazing-maps.blogspot.com/2009/01/africas-central-lake.html?m=1