Cyclopian/megalithic.. Pretty much interchangeable terms.
Though my studies in S/C America are pretty limited... Interested in the catastrophic destruction, Which seems to be Act of God in scope... And an interest in the chincana of Cusco, and etc... and how that connects to underworld mythology.
There;s some stuff there... And it lead me North.

This is interesting.
"In the legends and myths of the Aztecs, Teotihuacan was the place where the gods convened to give birth to the Fifth Sun of our era, after a previous world age had ended in darkness. It is in that remote age that we need to look for the unknown megalithic builders of Teotihuacan.
According to a story that was told and copied by Bernardino de Sahagún soon after the conquest:
“They say they came to this land to rule over it…they came from the sea on ships, a multitude of them, and landed on the shore of the sea, to the North…from there they went on, seeking the white mountains, the smoky mountains…led by their priests and by the voice of their gods. Finally they came to the place that they called Tamoanchan…and there they settled for some time…but it was not for long, for their wise masters left, took again to their boats…bringing back with them all their holy books and their sacred images”