For those interested and having Google Earth installed, the following link displays the rings of Atlantis scaled to the circular landform in the Parana Delta.
Right click the link and select 'Save Link As': Rings of Atlantis on Google EarthThe outermost ring represents Atlantis' outer channel of water with an outside diameter of 3.10 miles (27 stadia) and inside diameter of 2.41 miles (21 stadia). You can use the program's ruler feature (
Tools>Ruler) to verify the diameters.
Select Historical Imagery from the menu (
View>Historical Imagery) to get a clearer view of the island from 2003. There you will see some unique darkened areas mostly retained within the southern portion of the central ring. One of these dark patches conforms to the only manmade building dimensioned in Plato's account, one believed to be located on the small central island. In the image below a rectangular outline approximately 606 feet (1 stadium) by 303 feet (1/2 stadium) conforming to Poseidon's temple has been placed over this dark shaded area.

Are these dark patches signs of the surface soil being affected by buried structures such as the temple and palaces? There is likely another very simple explanation for these patches, but it does provide a sense of scale. Feel free to use the Google Earth link to examine the island for signs of ancient structures or excavation. You can also use the ruler feature to confirm the 10,000 stadia (1,150 mile) perimeter of the rectangular Mesopotamian Plain located off to the northwest.
For those wishing to locate the circular landform on an internet map site here are the coordinates linked to Google Maps:
33°54'59.04"S 58°31'26.50"W-Doug