Aqueducts built about 1,700 years ago in southern Peru still irrigates the arid valleys of Nazca. Built 450 km south of Lima, this thousand-year-old irrigation system that we owe to the ancient Nazca civilization.

The system, which also consists of channels on the surface, is still used to irrigate vegetable crops and fruit trees. Some 900 smallholder farming families in three valleys benefit from the structure, which carries between 18 and 20 litres of water per second.