Huaycán de Pariachi, Archaeological site in Ate district, Peru.

Huaycán de Pariachi is an archaeological site in the Ate District, on the eastern edge of Lima, Peru, divided into three sectors. Sector 1 holds the restored Palacio, built with both rammed-earth walls and stone-and-mud walls, with courtyards, benches, ramps, niches and deep circular collqas for storing food. Sector 2 preserves a walled segment of the Qhapaq Ñan, and Sector 3, 1 km west, has rammed-earth enclosures in poor condition.

The site grew as an administrative center in the middle Rimac Valley under the Ychsma culture, then was absorbed into the Inca Empire around 1400. This transition can be read in the gradual changes in building styles and spatial organization across the site.

The site's name comes from the Huarochirí Manuscript, which calls the settlement Pariacha; the restored palace stands in Sector 1, the llaqta. Terraces at the foot of the hills south and west of Sector 1 were drying floors where locally grown ají and coca were dehydrated by sun before storage, transport or use as ritual offerings.

The site sits on the eastern edge of Lima and can be reached by public transport or car, so wearing sturdy shoes is a good idea given the unpaved and sloped paths. There is little shade across the area, so bringing water and sun protection matters most during midday hours.

The restored Palacio mixes two building techniques: rammed-earth (tapial) walls and stone-and-mud walls. Its layout separates an administrative east side, marked by deep circular collqas for storing food, from a restricted residential southwest side. Square underground galleries there may have held mallquis, the mummy bundles of elite ancestors.