
People visit the historical city of Yazd in central Iran, on July 19, 2017. UNESCO has added the historic city of Yazd to its list of world heritage sites on July 9, 2017. (Xinhua/Ahmad Halabisaz)

People visit the historical city of Yazd in central Iran, on July 19, 2017. UNESCO has added the historic city of Yazd to its list of world heritage sites on July 9, 2017. (Xinhua/Ahmad Halabisaz)