Ancient South American Rock Engravings Identified as Massive Territorial Markers

New research reveals colossal snake carvings along the Orinoco River were used to delineate territories over 2,000 years ago.

Researchers mapped 14 sites featuring the world's largest rock engravings, some newly discovered.
The engravings, including a 138-foot-long snake, were likely visible from great distances.
Carvings depict snakes, human figures, and Amazonian centipedes, reflecting local mythology.
The study involved drone photography and computer-based visual analysis to understand the engravings' placement.
Efforts are underway to protect these sites, with local indigenous communities playing a key role.