Wild speculation: Would be interesting if the Richat Structure's crater-like appearance was formed by a crashed ship. I.e. the builders of Atlantis crashed there in a massive colony ship after fleeing from Planet 5 or whatever. Then they built the ringed city around the ship, with the ship sticking up and forming the center tower. They wanted to rebuild it to be able to reach the heavens again, starting all of the Tower of Babel myths as the crashed ship was ostensibly a tower. They had no way to ever restore it but had a prosperous civilization in the ringed city for many centuries after that, until the great flood totally murdered it and mostly only left behind the terraforming they'd done. The ship-tower collapsed and ended up reclaimed by the manmade lake that the ringed city was protected by. The denizens fled east, forming the ancient Egyptian civilization that build the pyramids and other unexplainable structures, using their advanced know-how. Also migrated north through the Middle-East to Europe, and also Mesopotamia, starting even more myths along the way. Basically scattered to the four winds and forced to start speaking a bunch of new languages to get by, thus the language part of the Tower of Babel story.
...well, that'd all be interesting, for sure.
Main issue is that the Tower of Babel being at the center of Atlantis doesn't jive with the Tower of Babel myth being post-flood. It's always said to be post-flood. What I'm describing is a pre-flood ToB. Also it's supposed to be in Mesopotamia IIRC, not Mauritania.