Jawa Dam (Jordan)
The 928th tallest dam in the world
Jawa is the site of the oldest proto-urban development in Jordan, dating from the late 4th millennium BC (Early Bronze Age). It is located in one of the driest areas of the Black Desert (Harrat al-Shamah) of Eastern Jordan. Remains of dams have been found, the largest of which is a masonry gravity dam and the oldest known dam in the world. It was used as a protection from flash floods.
Dam data from Wikidata (CC0) plus curated additions. Summary from Wikipedia (CC BY-SA).