Gargar Canal
Shushtar County, Iran
Gargar River is a man-made canal which is a world heritage site and a part of Shushtar Historical Hydraulic System, located in the island city Shushtar, Khuzestan province, Iran from the Sasanian era. Gargar River was registered on UNESCO's list of World Heritage Sites in 2009 and is Iran's 10th cultural heritage site to be registered on the United Nations' list together with the 12 other historical bridges, dams, canals, watermills and buildings as Shushtar Historical Hydraulic System.
Canal data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).