Atlantrope in spite of its name has no connection with Atlantis. It was in fact the name of an enormous dam building project first proposed in 1928 by the German architect Herman Sörgel (1885-1952). Ironically, he was hoping to create artificially what some think had existed in reality and within the memory of man and whose destruction may have led to the destruction of Atlantis.
His idea was to create dams at Gibraltar, the Dardanelles and the Strait of Sicily and gradually reclaim land by lowering the level of the Mediterranean and incorporate hydro-electric plants into the scheme(a)(b). He went further and suggested flooding large sections of the Sahara Desert. For a few years after Sörgel’s death, efforts were still being made to gain support for the idea.
Sörgel’s proposal was briefly referred to in the Sky’s second series of The Man in the High Castle.