I believe there's an ancient archaeological site in Bolivia at an elevation of over 12,000 ft that shows unequivocal evidence of a technological sophistication that, put in the context of when and
![Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute](https://www.geopolymer.org/wp-content/uploads/Capture-d%E2%80%99%C3%A9cran-2019-02-04-%C3%A0-15.00.10-300x164.jpg)
Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute
![Precision-made H-stones at Puma Punku (dimensions in mm). Each has about 80 surfaces. | Civilization, Ancient architecture, Ancient civilizations Precision-made H-stones at Puma Punku (dimensions in mm). Each has about 80 surfaces. | Civilization, Ancient architecture, Ancient civilizations](https://i.pinimg.com/474x/9f/33/4a/9f334acd83e2ee942957edb78b0564f3.jpg)