MASHAD, May 28 (MNA) Qasabeh karez underground water system traces back to times of Aryan influx of the land; it is a masterpiece of water system. Qasabeh qanat (karez) underground water system is located in Gonabad, Southern Khorasan Province. It is among the wonders of the history of civilization. It is one of the deepest wills ever to be dug by ...