Here is my ultra lame, uncolored, unlabeled map of Kéhuégonéa.
Or, what's left of it anyways. The island bits are just peaks that managed to stay above water level as it rose from massive amounts of debris in the ocean. Literally every other continent on the planet was destroyed via supernatural means, and what didn't disappear without a trace sunk into the ocean, leaving scattered "Atlantis' " everywhere. Kéhuégonéa is all that is left on the planet so it has since adapted the same name. They struggle with resources due to being self-contained, so much of their civilizations are either powerless or powered via magic, wind, or water.
You can imagine Kéhuégonéa as the New Zealand of your nightmares. And it's bigger than Africa.