Písac is a Peruvian village in the Sacred Valley on the Urubamba River. The area is perhaps best known for its Incan ruins, known as Inca Písac,
which lie atop a hill at the entrance to the valley.
The hillside is lined with agricultural terraces constructed by the Inca and still in use today. These terraces were created by hauling richer topsoil from the lower lands by hand. They enabled them to produce surplus food more than would normally be possible at altitudes as high as 11,000 feet.
The narrow rows of terraces beneath the citadel are thought to represent the wing of a partridge (pisaca), from which the village and ruins get their name. The birds are also common in the area at dusk.