Huge network of ancient cities uncovered in the Amazon rainforest
By Amarachi Orie, CNN (CNN) — Archaeologists working deep in the Amazon rainforest have discovered an extensive network of cities dating back 2,500 years. The highly structured pre-Hispanic settlements, with wide streets and long, straight roads, plazas and clusters of monumental platforms were found in the Upano Valley of Amazonian Ecuador, in the eastern foothills
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