https://www.thisiscolossal.com/2024/...amazon-cities/

"Rostain and his colleagues used aerial Lidar, which stands for light detection and ranging, to scan an ancient network of cities extending across 115 square miles in the Amazon. Built around 500 B.C.E. and occupied for hundreds of years until the population began to migrate away between 300 and 600 C.E., the Upper Amazon site’s immense scale places it in league with comparable Maya urban systems recently found in Mexico and Guatemala."