Maras is one of the towns of Peru's Sacred Valley, the core of the Inca civilization which ruled here during pre-Columbian times. Located about 40 km (around 25 mi.) north of Cusco (the principal city of the Valley), Maras is known for its salt evaporation ponds. About 5,000 of these ponds are arrayed along a canyon north of the town. As part of another project in the area, AirVuz Official put together this drone video of the ponds, which have been used to produce salt since Inca times and possibly earlier.