Here is an old paper on Atlantis that I think about from time to time. I love Atlantis, even though it's a rumor of a rumor. Perhaps it was the Minoans, though today I'd venture to say it's closer to the Richat structure, located south of the Atlas mountains of North Africa, off the coast of the Atlantic, addressing concerns of overnight destruction, muddy oceans, elephants, and concentric rings with fresh mountain water.