The Falaj Al-Khatm originates from within the Wilayat of Manah (Saal region), 30 km from the Wilayat. It is the only Daoudi Falaj in the Wilayat that still remains, although it is exposed to drought and depletion in the dry summers, it re-runs when it rains and its construction dates back to 2500 years ago. During the rule of the Prophet Suleiman bin David. It is rightly considered an engineering miracle because the bays in which it was built are so large that ten people cannot carry one of them.