atlantropa

Atlantropa, also sometimes referred to as Panropa was a gigantic engineering and colonization project devised by the German architect Herman Sörgel in the 1920s and propagated by him until his death in 1952.
A hydroelectric dam spanning the Strait of Gibraltar would cut off the water supply from the Atlantic to the Mediterranean sea lowering water levels by 200 meters, provide Europe with an enormous energy supply and connecting Europe and Africa with several landlines. Enormous inland lakes would be created in Africa, whole countries (Congo) be flooded to create fruitful soil.
Europe and Africa would amalgate naturally into the new self-sustaining super-continent of "Atlantropa" and together with Asia and America be one of the three great geographic and economic units.

link

link (in German, visualisation of Sörgel's project at the Technical University Darmstadt)

link (article on 'Strange Maps')