Egypt, China, Mesopotamia, and Indus Valley all had very early civilizations, but one theory is that the sea level was much lower before the great flood. The higher sea level after the great flood covered up much of the Minoan Civilization which was much larger and older than the other civilizations because it was the original civilization of Adam and Eve.
Under this theory the great flood only destroyed the Minoan civilization which at the time was called, “The face of the Earth”. (So that when the flood covered “the face of the Earth”, it only covered this civilization.) After the flood the sea level was higher than before, but the other civilizations all survived.
There is a lot of Minoan artwork with a woman (topless) holding snakes. Archeologists believe she was a “snake goddess” but she could have been depictions of Eve and the snake. If you google Minoan artwork, you’ll notice that the women are often topless.
This could be the origin of the story of Atlantis, a very large and advanced civilization that is believed to be at the bottom of the Mediterranean Sea. If you google Minoan Atlantis, you’ll see that some people believe the Minoans are Atlantis.
For creationists Atlantis, if it exists, would be the civilization of Adam and Eve, except that the creationists would say that the land didn’t sink, instead the water rose.