The valley, running generally west to east, is understood to include everything along the Urubamba River between the town and Inca ruins at Písac and Machu Picchu, distant. The Sacred Valley has elevations above sea level along the river ranging from at Pisac to at the Urubamba River below the citadel of Machu Picchu. 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, and Veronica, in elevation. The intensely cultivated valley floor is about wide on average. Side valleys and agricultural terraces (andenes) expand the cultivatable area.