Maras is a town in the Sacred Valley of the Incas, 40 kilometers north of Cuzco, in the Cuzco Region of Peru. The town is well known for its salt evaporation ponds, located towards Urubamba from the town center, which have been in use since Inca times. The salt-evaporation ponds are four kilometers north of the town, down a canyon that descends to the Rio Vilcanota and the Sacred Valley of the Incas. Since pre-Inca times, salt has been obtained in Maras by evaporating salty water from a local subterranean stream. The highly salty water emerges at a spring, a natural outlet of the underground stream.
The flow is directed into an intricate system of tiny channels constructed so that the water runs gradually down onto the several hundred ancient terraced ponds.