(click to enlarge) View of the valley and river above Pisac
(click to enlarge) Inca ruins near Pisac
According to Wikipedia:
"The Sacred Valley of the Incas or Urubamba Valley is a valley in the Andes of Peru, close to the Inca capital of Cusco and below the ancient sacred city of Machu Picchu. The valley is generally understood to include everything between Písac and Ollantaytambo, parallel to the Urubamba River, or Vilcanota River or Wilcamayu, as this Sacred river is called when passing through the valley. It is fed by numerous rivers which descend through adjoining valleys and gorges, and contains numerous archaeological remains and villages. The valley was appreciated by the Incas due to its special geographical and climatic qualities. It was one of the empire's main points for the extraction of natural wealth, and the best place for maize production in Peru."