The original pyramids in mexico were not made by Mayans either, they were inherited by them when they arrived and strictures were copied. Quoting: Anonymous Coward 32524672
There is one particular pyramid which isn't square but round, and it cannot be linked to any ancient race...
However, I believe that there was a hidden alien/ reptilian race that was always there but underground, that controlled whichever ancient race that arrived, who taught them things as well as human sacrifice - well, they got hungry between races.
Good find OP, I knew that the curent occupiers of Egypt could not have built the pyramids, and the oldest peoples in Egypt are Bedouin tribes, and there is no trace of the ancients anywhere in Egypt through descendancy, whereas mexico still has races that descended from the mayas.
The monolithic buildings of varying types were et projects. They were on the planet at various times and would renovate and add to what they had built previously.
They found educated populations that were primarily peaceful, then taught them math, flight, building construction, and other things.
The equipment was et equipment, and in some location aided by modern times ground construction equipment - cranes, forklifts, backhoes. The trained and educated populations were the workers of all types, including hover craft used to place the huge stones in place.
Jobs were designed and run by the et's.
The human sacrifice was a thing of the uneducated populations, and had nothing at all to do with the et's.
During et times, the old rituals became simulated. When the et's wouldn leave again taking the tech with them, the more violent tribes would overrun the peaceful communities repeating the ritual sacrifices.