Pumapunku, Archaeological site in Tiwanaku, La Paz Department, Bolivia

Pumapunku is a set of stone platforms and terraces within the Tiwanaku archaeological area in Bolivia, known for blocks shaped with right angles and channels that fit together without binding material. The ruins cover an area roughly 167 meters (548 feet) wide and 117 meters (384 feet) long on the high plateau at around 3900 meters (12,800 feet) in altitude.

The complex took shape between 536 and 600 CE as part of a religious center built by the Tiwanaku civilization, which came before the Inca. Centuries later the site fell into decline, and many stones were moved or repurposed by later inhabitants of the region.

The site takes its name from Aymara and Quechua words meaning 'Gate of the Puma,' which points to the role of the animal in Andean spiritual life. Visitors today see stone blocks carved with channels and recesses that likely held religious meaning for those who came here for ceremonies.

The site sits on a windy plateau where the thin air makes walking more tiring than at lower elevations. Visitors should bring layered clothing because the temperature can shift sharply during the day, and sun protection is important due to the intense radiation at this altitude.

The largest slab in the Plataforma Lítica measures 7.8 by 5.2 metres and averages 1.1 metres thick; cut from red sandstone, it is estimated at 131 tonnes. Petrographic and chemical analyses show that this sandstone was hauled up a steep slope from a quarry near Lake Titicaca, about 10 kilometres away, while the andesite facing came from the Copacabana peninsula some 90 kilometres off across the lake.