Plato wrote that Atlantis was a peninsula (nesos doesn’t necessarily mean island) just beyond the Strait of Gibraltar (“the Pillars of Hercules”) which he wrote was continental in size, which clearly is the Iberian peninsula, with the circular canal city of Posidon and Atlas submerged in the Sea of Cadiz, named for Atlas’s twin brother Gades, submerged when the Ice Age ended circa 1500 b. c.