Archaeologists working high in Peru’s northern Andes have uncovered what appears to be an Inca state storage complex featuring a carefully designed system for circulating air through its buildings.Image Credit : Wancasanga Archaeological Research Project - Andina
The discovery was made at the Wancasanga archaeological site in the Condebamba Valley, Cajabamba province, at an elevation of approximately 3,400 metres above sea level.
During the first systematic archaeological investigation of the site, researchers identified 12 circular structures believed to be colcas—storehouses used by the Inca state to preserve food and other essential supplies.
Nearby, archaeologists also uncovered a separate structure containing two stone-built ventilation ducts.
The combination of organised storage buildings, ventilation channels and the site's naturally exposed position suggests that the complex may have been deliberately designed to take advantage of local environmental conditions.
Twelve Possible Inca Storehouses
The investigation was conducted as part of the Wancasanga 2026 Archaeological Research Project, led by archaeologist Jerry Solano Calderón and funded by the District Municipality of Condebamba.
Researchers initially focused their work on Sector C of the archaeological site.
Excavations revealed 12 circular structures arranged in an orderly crescent-shaped formation along the edge of the settlement.
Their form and arrangement have led archaeologists to interpret them as possible colcas, storage facilities associated with the Inca state.
Colcas played an important role in the management of resources within the Inca administrative system, allowing food and other supplies to be stored and distributed when required.
The discovery at Wancasanga therefore provides a potential glimpse into the logistical infrastructure that supported Inca administration in the mountainous Andes.
An Ancient Ventilation System
One of the most intriguing discoveries was made close to the circular structures.
Archaeologists identified a separate structure containing two carefully constructed ventilation ducts.
The channels were built using side walls made from hewn and partially dressed stone blocks. Large stone slabs appear to have been placed over the channels, forming their roofs.
According to archaeologist Oswaldo Ezeta Latoche, the design would have allowed air to circulate through the structures.
Such ventilation could have helped regulate internal conditions and potentially protect stored materials from environmental deterioration.
The discovery is particularly notable because similar ventilation features have previously been identified in Inca colcas associated with the Qhapaq Ñan, the extensive road network that connected territories across the Inca Empire.
The Aryballos That Strengthened the Inca Interpretation
Archaeological evidence from inside one of the suspected storehouses provided another important clue.
Researchers recovered fragments of an aryballos, a distinctive type of Inca ceramic vessel.
The pottery strengthens the interpretation that the structures were constructed or used during the Inca period.
While the circular structures and their arrangement suggested a possible storage complex, the presence of characteristic Inca pottery provides additional archaeological evidence supporting that interpretation.
Further research will be needed to establish the precise chronology and function of the individual structures.
The Landscape May Have Been Part of the Design
The location of the complex appears to have been carefully selected.
The structures are situated toward the western end of Sector C, an area exposed to a greater incidence of winds.
According to project leader Jerry Solano Calderón, these conditions would have favoured the operation of the ventilation ducts.
This suggests that the builders may have incorporated the natural environment into the design of the storage complex.
Rather than relying solely on architectural construction, the system appears to have potentially used naturally occurring airflow to help regulate conditions within or around the structures.
The relationship between architecture and landscape could therefore be an important focus of future research at Wancasanga.
How Inca Storage Facilities Worked
The suspected colcas at Wancasanga appear to have formed part of a broader system of resource management.
The Inca state depended on extensive administrative and logistical networks to collect, store and redistribute food and other essential materials across its territories.
Storage facilities were therefore important components of the wider state infrastructure.
At Wancasanga, the combination of multiple circular structures and possible ventilation technology suggests that environmental control may have been incorporated into this storage system.
However, the current investigation has not yet established exactly what commodities were stored at the site.
Further archaeological analysis may help determine the specific function of the structures and the resources they once contained.
From a 1989 Survey to New Archaeological Research
The 2026 investigation builds on earlier research.
In 1989, architect José Pineda Quevedo conducted a survey of settlement patterns in the Condebamba Valley and divided Wancasanga into archaeological sectors.
More than three decades later, archaeologists have returned to the site to conduct systematic surveys and excavations in Sectors C and D.
The renewed investigation is providing an opportunity to examine the site using modern archaeological approaches and to place individual structures within a broader understanding of the settlement.
A Multidisciplinary Investigation
The Wancasanga project brings together specialists from several fields.
The archaeological team includes Oswaldo Ezeta and Diana Agapito Torres, while anthropologist Anny Vega Fajardo contributes to the investigation of the site's human dimension.
Conservation specialist Susy Esquivel Valverde is involved in preserving archaeological materials, while communications specialist Felipe Arroyo Cornejo supports the project's public outreach.
Local residents from Chauchabamba have also participated in excavation work and educational programmes connected with the project.
Their involvement provides an important local dimension to the continuing investigation of the archaeological landscape.
Wancasanga and the Wider Inca Administrative Network
Researchers hope continued investigations will clarify Wancasanga's role within the Inca administrative and logistical system.
The project will also examine the site's relationship with nearby archaeological locations, including Ichabamba.
Understanding these connections could help archaeologists determine whether Wancasanga functioned as an important storage and distribution point within a wider network.
The site's location at approximately 3,400 metres above sea level also provides an opportunity to investigate how the Inca adapted administrative infrastructure to challenging highland environments.
Architecture, Wind and Resource Management
Perhaps the most significant aspect of the discovery is the apparent relationship between architecture and the environment.
The suspected storehouses were constructed in an organised arrangement, while the nearby ventilation ducts appear to have been designed to allow air movement.
The structures' position in an area exposed to stronger winds may have enhanced this system.
Together, these elements suggest that the builders understood how the local environment could be incorporated into the design of facilities intended to preserve valuable resources.
The discovery therefore offers more than evidence of ancient storage. It potentially reveals how Inca planners combined architecture, environmental conditions and logistical organisation.
What Comes Next?
The 2026 investigation represents only the beginning of systematic archaeological research at Wancasanga.
Researchers will continue studying the structures, artefacts and landscape to establish the site's chronology and determine its precise role.
Future investigations could clarify:
How the 12 circular structures were used
What materials were stored inside them
How the ventilation ducts functioned
When the complex was constructed and used
How Wancasanga connected with nearby sites
What role the settlement played in the wider Inca administrative system
The answers could provide new insight into how the Inca state managed resources across the mountainous landscape of the Andes.
Conclusion
The discovery of a possible Inca storage complex at Wancasanga has revealed 12 circular structures alongside an unusual system of stone-built ventilation ducts.
Located approximately 3,400 metres above sea level in Peru's northern Andes, the complex appears to have been carefully positioned in an area exposed to strong winds.
Fragments of an Inca aryballos found inside one of the suspected storehouses further strengthen the interpretation of the structures as Inca-period facilities.
The evidence suggests that the builders may have combined organised storage architecture with naturally occurring airflow to help regulate conditions and protect stored supplies.
As archaeological investigations continue, Wancasanga could provide valuable new evidence for understanding the logistical and administrative systems that allowed the Inca state to manage resources across one of the world's most challenging landscapes.
Sources : Andina
FAQ
Where was the Inca storehouse complex discovered?
The complex was discovered at the Wancasanga archaeological site in the Condebamba Valley, Cajabamba province, in Peru's northern Andes.
How high is Wancasanga?
The archaeological site lies at approximately 3,400 metres above sea level.
How many possible Inca storehouses were discovered?
Archaeologists identified 12 circular structures that are believed to be possible colcas, or Inca storehouses.
What is a colca?
A colca was a storage facility associated with the Inca state, used to preserve food and other essential supplies.
What was unusual about the Wancasanga complex?
Nearby archaeologists found a structure containing two stone-built ventilation ducts that may have circulated air through the storage facilities.
How old is the complex?
The supplied source identifies the structures as likely belonging to the Inca period but does not provide a specific construction date.
What artifact supports the Inca interpretation?
Fragments of an aryballos, a distinctive Inca ceramic vessel, were discovered inside one of the suspected storehouses.
Why were the structures built where they were?
Researchers believe the location may have been deliberately selected because the western part of Sector C receives greater exposure to winds, potentially helping the ventilation system function.
What is the Qhapaq Ñan?
The Qhapaq Ñan was the extensive road network that connected territories throughout the Inca Empire. Similar ventilation features have been identified in Inca storehouses associated with this network.
When was Wancasanga first investigated?
Architect José Pineda Quevedo conducted a settlement-pattern survey of the Condebamba Valley in 1989, which included an initial division of Wancasanga into archaeological sectors.
