Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. – Geopolymer Institute
Elaborate stone carving in megalithic stone at Puma Punku, part of the Tiwanaku archaeological complex, a UNESCO world heritage site near La Paz, Boli Stock Photo - Alamy
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UNESCO World Heritage Centre - Document - Ruins of Puma Punku. Tiwanaku: Spiritual and Political Centre of the Tiwanaku Culture (Bolivia (Plurinational State of))