<P> The Sacred Valley of the Incas (Spanish: Valle Sagrado de los Incas; Quechua: Willka Qhichwa) or the Urubamba Valley is a valley in the Andes of Peru, 20 kilometres (12 mi) at its closest north of the Inca capital of Cusco . It is located in the present - day Peruvian region of Cusco . In colonial documents it was referred to as the "Valley of Yucay ." The Sacred Valley was incorporated slowly into the incipient Inca Empire during the period from 1000 to 1400 CE . </P> <P> The scenic and historical Sacred Valley is a major tourist destination . In 2013, 1.2 million people, 800,000 of them non-Peruvians, are estimated to have visited Machu Picchu, its most famous archaeological site . Many of the same tourists also visited other archaeological sites and modern towns in the Sacred Valley . </P> <P> The valley, running generally west to east, is understood to include everything along the Urubamba River between the town and Inca ruins at Písac westward to Machu Piccu, 100 kilometres (62 mi) distant . The Sacred Valley has elevations above sea level along the river ranging from 3,000 metres (9,800 ft) at Pisac to 2,050 metres (6,730 ft) at the Urubamba River below the citadel of Macchu Piccu . On both sides of the river, the mountains rise to much higher elevations, especially to the south where two prominent mountains overlook the valley: Sahuasiray, 5,818 metres (19,088 ft) and Veronica, 5,893 metres (19,334 ft) in elevation . The intensely cultivated valley floor is about 1 kilometre (0.62 mi) wide on average . Side valleys and agricultural terraces (andenes) expand the cultivatable area . </P> <P> The valley was formed by the Urubamba river, also known as the Vilcanota River, Willkanuta River (Aymara, "house of the sun") or Willkamayu (Quechua). The latter, in Quechua, the still spoken lingua franca of the Inca Empire, means the sacred river . It is fed by numerous tributaries which descend through adjoining valleys and gorges, and contains numerous archaeological remains and villages . The Sacred Valley was the most important area for maize production in the heartland of the Inca Empire and access through the valley to tropical areas facilitated the import of products such as coca leaf and chile peppers to Cuzco . </P>

What is the altitude of the sacred valley