Upano Valley sites
Morona-Santiago Province, Ecuador
The Upano Valley sites are a cluster of archaeological sites in the Amazon rainforest. They are located in the Upano River valley in Morona-Santiago Province in eastern Ecuador. The sites comprise several cities; they are believed to have been inhabited as early as 500 BC, predating any other known complex Amazonian society by over a millennium.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).