Bolivia
A hypothesis by Jim Allen argues that Plato’s description exactly fits South America because he describes a level rectangular-shaped plain which he said lay in the centre of the continent, next to the sea and midway along the longest side of the continent. He also described the capital city of Atlantis which was built on a small volcanic island and also called Atlantis. The city lay on the level rectangular plain, five miles from the sea and according to Plato the whole region was high above the level of the ocean sea, rising sheer out of the ocean sea to a great height on that side of the continent. Thus we have both a lost city of Atlantis as well as a lost continent of Atlantis.
Source: Wikipedia
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