Until about 30 years ago, Western academic opinion agreed that the Amazon Basin could never have sustained large populations; due to the limitations of a tropical environment, the area could support only hunting and gathering and slash-and-burn agriculture. Subsequent archaeological research proved this opinion wrong. The savannas and forest of the Bolivian Amazon were, in fact, once densely populated by well-organized societies, and precolumbian farmers heavily modified the landscape.
Prehispanic raised fields in the savannas of the Llanos de Moxos of Bolivia. The elevated planting platforms are 20 meters wide, 0.2-1 meter tall, and up to 600 meters long.
Thanks. Your pics are of the Bolivian ‘high plains’ and so not the same environment as the Brazilian Amazon basin, no? Still the Amazon basin but a different environment, I’d think.