qanat
An underground conduit, between vertical shafts, that leads water from the interior of a hill to villages in the valley
Shafts are dug to the required level along the planned route of the qanat, every 300 m or so […].
Where it comes from
From Classical Persian قنات (qanāt), from Arabic قَنَاة (qanāh).
Adapted from the Wiktionary entry qanat (CC BY-SA 4.0).