Haj Asadollah Ab Anbar
Gerash County, Iran
Berkeh Haj Asadollah or Berkeh Kashkool (lit. Haj Asadollah water reservoir), located in Gerash, Fars province, Iran, was built in 1286 A.H. (1869 A.D), by Haj Asadollah, son of Dahbashi Karbalayi AliReza Gerashi, and is the largest Berkeh (water reservoir built manually) after “Berkeh Kal” in Gerash.
Reservoir data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).