I'm not sure it's true either, but the fact that his account does correctly describe the position of the sun in the sky and the fact that Herodotus includes thi

I'm not sure it's true either, but the fact that his account does correctly describe the position of the sun in the sky and the fact that Herodotus includes this information to discount the story to me tells of at least some kind of trip down to the southern portion of Africa. Total circumnavigation, though, I do doubt. Edit: Also, it wasn't Egyptians that did this but Phoenicians at the order of the Pharoah.