A small agricultural town of Gonbad-e Qabus (also pronounced Gonbad-e Kavoos) lies approx. 500km east of Mashhad and is home to the UNESCO World Heritage Site under the same name – spectacular Gonbad-e Qabus brick tower. Built in 1006 as a burial chamber for a Ziyarid prince, it is 72m-high and is one of the tallest brick towers in the world.
The tower walls are 3 metres thick and the tower itself is 17 metres in diameter. It is part of the world’s second largest defence wall, the 155km-long Qizil Alan.