Gonbad-e Qabus is one of the most significant tomb towers in Iran and the tallest brick tower of its kind in the world. It is a tangible cultural heritage of Iran registered in UNESCO List as World Heritage Site in 2012. This beautiful tower belongs to the 10th century when Qabus, son of Voshmgir, the Ziarid king, was ruling in Iran. The tower structure is simple and made of fired bricks, yet amazing and eye-catching.

There are different opinions about the function of Gonbad-e Qabus tower. Some believe that it has been a burial structure and the place where Qabus Ibn-e Voshmgir, Ziarid ruler of approximately 10th and 11th centuries in northern Iran. As archeologists have not found any corpses in the cellar, it is not possible to approve or disapprove this opinion.

Based on the relations between Qabus and scientists, men of letter and astronomists, others believe that Qabus had planned to build this structure to use it as an observatory. These scholars refer to the historical sources where Qabus has ordered the construction of this building. Whatever the purpose of the construction is, Gonbad-e Qabus is at its glorious peak of ancient architecture and attracts the attention of the travelers who pass by the area. It is a witness of the history of art and architecture in Iran.

The architectural style of this building is the somewhat between Khorasan style and early Razy style. The builders have used fine materials in their works. For instance, they have used baked bricks for the whole structure. The quality of structure speaks for itself. It has survived the time, climate and many other unkind treatments.

The exterior body of Gonbad-e Qabus is circular and 52 meters high including its conical roof. The entire tower has been built on an artificial hill as high as 10.