The Great Man Made River - Official project video - Libya

Great Man-Made River (GMR), a network of underground pipelines bringing high-quality fresh water from ancient underground aquifers deep in the Sahara to the coast of Libya for domestic use, agriculture, and industry.

It is the largest underground network of pipes (2,820 kilometres (1,750 mi)) and aqueducts in the world. It consists of more than 1,300 wells, most more than 500 m deep, and supplies 6,500,000 m3 of fresh water per day to the cities of Tripoli, Benghazi, Sirte and elsewhere.