Researchers have uncovered more than 2.5 kilometers of previously unknown roads concealed beneath the dense canopy surrounding Machu Picchu. Utilizing advanced laser scanning technology, they detected ancient pathways, including a prominent route extending at least 1.2 kilometers, along with possible agricultural terraces and elevated platforms.
This breakthrough occurred in the Mandor wall region, located east of Machu Picchu, where initial archaeological investigations took place in July 2023. The challenging terrain, marked by steep slopes and thick cloud forests, makes it difficult to identify ruins that remain deeply hidden under vegetation.
To overcome these obstacles, scientists employed LiDAR technology to scan the area from above. The generated images exposed subtle ground features obscured by heavy foliage, revealing the concealed roads.
An Extensive Meandering Road Emerges from the Forest
The most striking revelation is a pathway stretching at least 1.2 kilometers. This winding road, uncovered once the plant cover was digitally removed, showcases elements characteristic of Inca engineering. However, its exact origins remain uncertain until archaeologists can determine its age and creators.
Further on-the-ground examination is essential to establish the road’s date, usage, and its relationship with other nearby structures. According to Heritage Daily, the survey uncovered more than just a solitary hidden path. Collectively, researchers identified over 2.5 kilometers of uncharted pre-Hispanic roads, as well as potential agricultural features warranting deeper study.
LiDAR Offers Vision Beyond Dense Vegetation
Exploring areas cloaked in thick forest is notoriously difficult, as ancient roads remain virtually invisible beneath foliage and thick undergrowth. LiDAR, which stands for Light Detection and Ranging, enables researchers to penetrate these natural visual barriers and detect subtle ground details.
The technique sends laser pulses towards the earth, measuring the time it takes for the signals to bounce back. This data is then processed to generate comprehensive terrain maps. Such maps highlight roads, terraces, foundations, and other structures otherwise obscured by dense vegetation. Around Machu Picchu, LiDAR revealed multiple ancient roads along with suspected terraces and platforms.
Understanding Their Purpose and History
The laser data provides a foundation for planning detailed fieldwork. Officials in Cusco are advocating targeted archaeological studies to ascertain the dating, construction techniques, function, and preservation status of these newly uncovered features.
Efforts will also focus on ensuring their protection and integrating these findings into the broader Machu Picchu heritage context. Maritza Rosa Candia, executive director of the DDC Cusco, highlighted how cutting-edge technology is broadening experts' understanding of the landscape around Machu Picchu and guiding future research and conservation priorities.
Despite over a century of archaeological work and Machu Picchu’s designation as a UNESCO World Heritage Site since 1983, the surrounding forest has kept more than 2.5 kilometers of ancient roads out of sight—until now.
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