Marib Dam Wikipedia
The Marib Dam (Arabic: سـدّ مَـأرِب Sadd Ma''rib, or sudd Ma''rib) is a dam blocking the Wadi Adhan (also Dhana or Adhana), in the valley of Dhana in the Balaq Hills, Yemen. The current dam is close to the ruins of the Great Dam of Ma''rib and dates to around the 8th century BC.