In the 1920s German architect Herman Sorgel had a plan: Solve nearly all of Europe’s social, economic, and environmental problems by partially draining the Mediterranean. He called the project “Atlantropa,” and it would have been a massive environmental disaster.

View a 1951 clip outlining the plan (in German) here. Below is an image of Sorgel’s plan for a mssive dam across the strait of Gibraltar, which would have dwarfed even the Three Gorges Dam.