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Ingapirca ("Wall of the Inca" in Quechua) sits at approximately 3,160 metres elevation in Cañar Province in the Ecuadorian highlands. It is the largest and best-preserved pre-Columbian archaeological complex in Ecuador, and one of the clearest surviving examples of the layered relationship between the Inca Empire and the cultures it absorbed during its rapid 15th-century expansion.
The site was originally sacred to the Cañari people, an agricultural and moon-worshipping society who occupied the southern Ecuadorian highlands for centuries before Inca contact. When the Inca Empire, under Tupac Yupanqui and later Huayna Capac, extended its control into the region in the late 15th century, they built directly on top of and around the existing Cañari religious centre — a common Inca strategy for absorbing conquered peoples' sacred geography rather than erasing it.
The complex's defining structure is the Castillo, an elliptical platform of finely fitted Inca ashlar masonry that functioned as a Temple of the Sun (Inti). Its curved form is unusual among Inca structures, which typically favour rectilinear designs, and is thought to reflect adaptation to the pre-existing Cañari sacred site beneath it. The temple's walls and openings are astronomically aligned to track solstices and equinoxes, allowing priests to regulate the agricultural and ceremonial calendar.
Surrounding the Castillo are the remains of collca (storage buildings), a possible Cañari-era cemetery, aqueducts and water channels, and a stretch of the Inca road system (Qhapaq Ñan) that once connected Ingapirca to Cusco, over 1,600 kilometres to the south. Excavations have recovered ceramics, tools, and burial goods from both Cañari and Inca occupation phases, allowing archaeologists to document the transition between the two cultures in unusual material detail.
Ingapirca was studied by early travellers including the Spanish naturalist Antonio de Ulloa in the 18th century, and has been the subject of sustained Ecuadorian and international archaeological research since the early 20th century. It remains an active site of both scholarship and Cañari cultural identity, with the nearby Inti Raymi and Cañari solstice festivals still celebrated at the site today.