BRASÍLIA, July 29 — Hundreds of ancient structures hidden beneath the Amazon canopy, first spotted by airborne lidar technology, are about to face their first boots-on-the-ground scrutiny. The research team behind the discovery now plans a series of ground verification expeditions to hike into the dense rainforest, locate the features using GPS and drone photography, and document them. Because of the remote locations and extremely difficult terrain, those surveys may take years to complete.
The structures themselves remain at risk. Deforestation, illegal mining, and agricultural expansion are all creeping closer to these sites. In August 2023 alone, the Brazilian Amazon lost roughly 1,100 square kilometers of forest cover, according to Brazil’s National Institute for Space Research (INPE). That context makes the discovery both urgent and fragile.
Ground Verification Ahead
The planned expeditions are not simple walks in the woods. Researchers will need to navigate thick vegetation, often without established trails, to reach the coordinates identified in the lidar imagery. The team will rely on GPS devices and overhead drone photography to confirm the presence of the structures and to record their condition.
The encouraging part, the researchers note, is that the lidar data already gives them a strong sense of where to look. But ground confirmation is essential before any formal protection steps can be taken.
Risk from Deforestation and Mining
The same forces that have eaten away at the rainforest are now a direct threat to these newly visible archaeological sites. Illegal mining operations, which often dig into riverbanks and drain mercury into waterways, can obliterate shallow subsurface features. Agricultural expansion, particularly for cattle ranching and soybean farming, can flatten terrain and remove the very vegetation that first hid these structures from view.
Brazil’s National Institute for Historical and Artistic Heritage (IPHAN) may become involved in future protection efforts. The research team expects to publish their peer-reviewed findings within one to two years. Further funding will be needed to continue surveys and support conservation measures.
Indigenous Consultation and Policy Implications
Many of the sites lie on lands that belong to Indigenous communities. The research team has stated that those communities will be consulted about the discoveries and about any subsequent conservation or documentation activities. The discovery could also strengthen arguments for expanding protected areas or for establishing new Indigenous territories.
The international community — including UNESCO — may take an interest in potential World Heritage designations for this region. Findings from the lidar project may also influence reforestation and climate policy, because understanding how ancient peoples used the land helps scientists predict how the forest will respond to changing conditions.
For now, the next step is the slow, careful work of walking into the jungle with a GPS and a camera. Early findings suggest a landscape far more populated and engineered in the past than previously assumed. Researchers encourage everyone with an interest in Amazon conservation to watch for the peer-reviewed results and to talk to local experts and Indigenous leaders about how best to protect what has been found.
