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The Kish qanat is more than 2,500 years old and currently has been converted into an underground town at a depth of 16 meters below the surface, with an area of more than 10,000 sq m. Qanat is an ancient system found in arid regions that bring groundwater from the cliff, or base of a mountainous area, following a water-bearing formation (aquifer) or rarely from rivers, and emerge at an oasis, through underground tunnel or a series of tunnels. The tunnels perhaps several kilometers long, are roughly horizontal, with a slope. This allows water to drain out to the surface by gravity to lower and flatter agricultural land. Considered to be the oldest feat of human engineering, this system can be found still working in Iran.
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North Africa/Middle East
