Gonbad-e Qabus in Iran (UNESCO) A small agricultural town of Gonbad-e Qabus (also pronounced Gonbad-e Kavoos or Gonbad-e Kavus) lies approx. 500km east of Mashhad, in Golestan province, Iran. It is home to the UNESCO World Heritage Site under the same name- the spectacular Gonbad-e Qabus brick tower. According to the two Kufic inscriptions encircling