Modern deforestation in the Acre state of Brazil has allowed the discovery of more than 450 of large geometrical geoglyphs or enclosures, providing evidence for how indigenous people lived in the Amazon before European people arrived in the region.
An approach of a combination of satellite imagery, aerial photography by drones and ground surveys lead to a discovery of dozens of new geoglyphs in at Quilcapampa, in the Sihuas Valley, Peru.
Vast fields of dome-shaped earthen mounds were found by archaeologists in 1000-year-old sites in Cambodia. The features are organised into gridded patterns. The scientists are puzzled what these structures were used for.