Huaca Palao, Pre-Hispanic archaeological site in San Martín de Porres District, Peru.

Huaca Palao is an archaeological site in Lima consisting of streets, dividing walls, a cemetery, and defensive structures built with mud and stone. The complex sits on a natural hill that was modified with terraces to provide access to both coastal and agricultural resources.

The site dates to the Late Horizon period when Tupac Yupanqui defeated the Colli leaders and brought the region under Inca rule. This conquest marked a major shift in how the coastal area was governed and organized.

On the summit stands a Christian cross that is lowered for religious celebrations each May, organised by local residents. The site was used in the colonial extirpation of idolatries, and today neighbours still gather there for these observances.

The site is located in northern Lima at the intersection of the Ingeniería and Palao neighborhoods, near the Constitutional Province of Callao. Visitors should expect uneven ground and wear appropriate footwear for walking on the archaeological terrain.

The perimeter fence was finished on 31 August 1981, when residents of the fourth block of Jirón Nicolás de Piérola formed a committee to protect the site. Part of it was later demolished with heavy machinery in 2009, and again in 2010 when people tried to take possession of the land.