Inca Uyo, Archaeological site in Chucuito District, Peru.

Inca Uyo is an archaeological complex in southern Peru containing over 80 carved stones standing upright from the ground, arranged within a rectangular walled structure made of precisely cut blocks. The entire layout demonstrates careful craftsmanship and was positioned strategically at this high altitude location on the altiplano.

The site developed in pre-Columbian times as a center for ritual and astronomical activity, later documented by Spanish chroniclers in the 16th century. The structure shows that people in this region possessed complex knowledge of geometry and the heavens.

The name comes from Aymara Inka Uyu. The carved mushroom-shaped stones inside were brought here in 1993 from other Inca buildings, where they had held roofs. Their rearrangement into rows, promoted to draw tourism to Chucuito, gave rise to the fertility-temple nickname that guides still repeat.

The site sits at high altitude in a sparsely populated area, making warm clothing and sun protection necessary while allowing time for altitude adjustment. Sturdy footwear is wise since the ground is uneven and becomes slippery after rain.

The fertility-temple identity is recent: from 1993, phallus-shaped stones were placed inside the enclosure to market Chucuito as a tourist destination. The carved stones are Inca-style roof pegs (clavijas fungiformes), and the site was declared a National Cultural Heritage in 2001.