Nope. Atlantis is 100% FICTION.
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People said the same of Troy. Then it was unearthed. We haven’t discovered all the lost cities yet. Trust Plato.
Of course all of the “Troys” we’ve found are just cities that got in big wars.
I do trust Plato. Having actually READ Timaeus and Critius I understand that they were his version of Atlas Shrugged and there’s no more an Atlantis than there is a Galts Gulch.