Object description

The Ghasabe Qanats of Gonabad , also called Kariz Kai Khosrow, is one of the world's oldest and largest networks of qanats . Built between 700 and 500 BCE by the Achaemenid Empire in what is now Gonabad, Razavi Khorasan Province, Iran, the complex contains 427 water wells with a total length of 33,113 metres . The site was first added to UNESCO's list of tentative World Heritage Sites in 2007, then officially inscribed in 2016, collectively with several other qanats, as "The Persian Qanat".