![PDF] Tiahuanaco monuments ( Tiwanaku / Pumapunku ) in Bolivia are made of geopolymer artificial stones created 1400 years ago | Semantic Scholar PDF] Tiahuanaco monuments ( Tiwanaku / Pumapunku ) in Bolivia are made of geopolymer artificial stones created 1400 years ago | Semantic Scholar](https://ai2-s2-public.s3.amazonaws.com/figures/2017-08-08/ac345e3c5b43be4ed1d9cb9530b5a4a745c250c8/4-Figure3-1.png)
PDF] Tiahuanaco monuments ( Tiwanaku / Pumapunku ) in Bolivia are made of geopolymer artificial stones created 1400 years ago | Semantic Scholar
![Stairs of Pyramid Akapana at Ancient Tiwanaku Ruins, Bolivia Stock Image - Image of excavations, detail: 35174911 Stairs of Pyramid Akapana at Ancient Tiwanaku Ruins, Bolivia Stock Image - Image of excavations, detail: 35174911](https://thumbs.dreamstime.com/z/stairs-pyramid-akapana-ancient-tiwanaku-ruins-bolivia-precolombian-civilization-altiplano-south-america-35174911.jpg)
Stairs of Pyramid Akapana at Ancient Tiwanaku Ruins, Bolivia Stock Image - Image of excavations, detail: 35174911
![The Akapana pyramid - Google Search: A modern reconstruction of what researchers believe this structure woul… | Pyramids, Out of place artifacts, Ancient technology The Akapana pyramid - Google Search: A modern reconstruction of what researchers believe this structure woul… | Pyramids, Out of place artifacts, Ancient technology](https://i.pinimg.com/originals/f4/b3/e5/f4b3e59f02a499380567c2d9e25646fe.jpg)