A breakthrough LiDAR survey conducted across the rugged terrain of Australia's Blue Mountains has identified a massive, previously hidden network of stone cairns and rock alignments. Dating back roughly 10,000 years, these structures appear to have served as a sophisticated pathfinding system for Indigenous groups navigating the Great Dividing Range. The technology allowed researchers to 'see through' the dense eucalyptus canopy that has obscured these sites for millennia.
The cairns are strategically placed on ridgelines and near hidden water sources, forming a 'visual map' of the landscape that corresponds to traditional songlines and oral histories. Some of the alignments point toward specific astronomical markers, indicating that the network served both a practical navigational purpose and a deep ceremonial function. This find represents one of the most extensive examples of ancient landscape engineering in the Southern Hemisphere.
Archaeologists working with local Darug and Gundungurra elders are now documenting the sites to ensure their preservation. The discovery underscores the immense scale of land management practiced by Aboriginal Australians long before the rise of settled agricultural civilizations elsewhere. Further study will focus on the specific geological origins of the stones used, many of which appear to have been transported over significant distances to reach the ridgelines.