Geography of Atlantis
The Geography of Atlantis is discussed in detail by Plato who, according to Bacon and Galanopoulos, seemed to imply[263.39] that it consisted of two principal islands that were located beyond the Pillars of Heracles.
How they arrived at this conclusion is difficult to understand when you read Timaeus 25a-b
“Now in this island of Atlantis there existed a confederation of kings, of great and marvellous power, which held sway over all the island, and over many other islands also and parts of the continent; and, moreover, of the lands here within the Straits they ruled over Libya as far as Egypt, and over Europe as far as Tuscany.” (Bury)
To me, it seems clear from this that the ‘confederation’ ruled over a number of islands as well as portions of nearby continental mainlands>of Europe (Italy) and Africa (most likely centred on Tunisia). These are the only territories unambiguously named as Atlantean by Plato (Tim. 25a-b & Crit.114c).<
>Egerton Sykes thought that the Tuatha de Danaan were refugees from Atlantis, an idea he expressed in his 1949 edition of Ignatius Donnelly’s Atlantis. Sykes was convinced that Murias one of the four legendary cities of the de Danann had been located in Bimini. This highly speculative idea failed to bear fruit as have all efforts to identify the location of the other three cities, Falias, Finias and Gorias. But this is pure speculation.<