I watched this video today that is one of the best examples to show off how pyramids were built by technologies far above our current understanding. There is nothing to prove with peer reviewed papers about pyramids being built with more advanced technology than what we have. We don't even need conspiracy theories for it. A simple observation of real world events is sufficient for the job.

When you have time, take a look at the maps that Europeans made around the time of Fall of Constantinople. A great deal of ancient knowledge was leaked to the world at that time. I'm talking about knowledge that should predate even the Romans by thousands of years.