so the myth goes that the people that settled in Egypt around 15 000 years ago came from Atlantis or "the Eye of the Sahara" - this place was the pinnacle of society, and according to myth were so advanced that "the Gods punished them" and thus afterwards, they migrated to Egypt and rebuilt there, before the "Great Flood" around 12, 500 years ago.  The assumption is that these people helped define Sumerian scriptures, as well as build things like the Sphinx (before Old Egypt pharaohs repurposed it)

Solon speaks of this place Atlantis, among others, but it's carried through Myth now rather than any factual or quantitative evidence. What we know is that Atlantis was 3 concentric circles, each one containing water and connecting to a great river.  It was also "East of the Pillars of Hercules" which makes sense if you were looking out to the Atlantic Ocean through the "pillars" (Gibraltar and Africa) from the center of the Mediterranean sea. In fact the mountain in Morocco is called the "atlas" mountains.