See this video and also those by Stephen Mehler, Brien Foerster, John Anthony West, and the excellent open-source pyramid research headed by Dr Samir Osmanagich (Bosnian Pyramids). So far discovered, there are reportedly over 10,000 pyramids all over the world, with 200 pyramids in USA alone, one being of larger volume than Great Pyramid at Giza.
2021 ESTC https://www.youtube.com/watch?v=gEKtI79F6Hs
Excellent info from wide variety of sources, ideas. Makes case for pyramids as power...