First i would like to correct the young lady above, Atlantis in Greek, Ἀτλαντίς, "daughter of Atlas" not lsland.
As much as Atlantis-hunters would wish you to believe Plato to have been a historian in the mould of Herodotus he was not. And nor was he a geographer in the mould of, say, Hecataeus. On the contrary Plato was a philosopher and a part-time mythologist. Moreover he was not even an ordinary philosopher; rather he was what was called a ‘true philosopher’, whose interests lay primarily in metaphysical otherworldly matters. Therefore, if there is any truth behind Plato’s account of Atlantis it is unlikely to have anything to do with history or geography rather, it should be rooted in myth, mysticism, esotericism and the metaphysical world.
Herodotus tells a highly revealing story of a bragging contest between the Athenians and the Tegeans in which each side listed their greatest military accomplishments. Here, the Athenians recited their heroism at the battle of Marathon, but spoke also of their achievements in ancient times their intervention in the war of ‘the Seven against Thebes’, their repulsion of the Amazonians who had invaded Attica, and their instrumental role in the Trojan War. But as for the idea that their ancestors had repulsed the invasion of Atlantis, the Athenian soldiers said nothing at all a very strange omission if Plato’s account contained any historical truth.
I would remind you that there is no archaeological evidence for the historicity of the war between Athens and Atlantis (quite the opposite); that there is no evidence whatsoever for a sunken island-continent on the Atlantic Ocean floor; that Herodotus and Socrates had never heard of the Athens-Atlantis war, also that Plato did insist on the poetic (i.e. mythical) nature of Solon’s story by comparing Solon to the great poets Homer and Hesiod; that Plato did place the war in a pre-diluvian era (predating the creation of mankind!); and that Plato was not a historian, nor a geographer, but a true philosopher,
It therefore makes sense that Atlantis signified the ‘true myth’ of the creation of the Universe, encapsulating ideas such as the antediluvian paradise lost the fall of the sky, the mystery of the underworld, and the mystery of the soul, or spirit that had brought everything to life.
Thus Atlantis becomes a symbol for a spiritual quest, the quest for knowledge of the origins of the Universe, the quest for knowledge of the origins of life, and the quest for knowledge of what life truly is.
So, To search for Atlantis here on Earth, in the form of a lost civilisation, is the veritable antithesis of Plato’s philosophy. I believe The great man would be grieved indeed to witness such materialistic folly.