High-altitude archaeologists have discovered a remarkably well-preserved Inca Tambo (waystation) located at an elevation of 4,200 meters in the Chilean Andes. This site served as a critical logistics hub for the 'Qhapaq Ñan' road system, facilitating the transport of silver and textiles across the southern reaches of the empire. The extreme cold and dry environment have preserved the organic materials of the site with incredible detail, including leather llama harnesses and woolen storage sacks.
Hidden within a stone wall niche, researchers found a cache of five intact quipus—the knotted string devices used by the Inca for record-keeping. Initial analysis suggests these quipus recorded the exact quantities of dried meat and grain moving through the high-altitude pass, as well as labor quotas for the local population. This discovery provides a granular look at how the Inca managed their vast territories through a combination of physical infrastructure and sophisticated data management.