Gonbad-e Qabus (tower)
The tallest brick tower in the world, Gonbade Qabus tower is located in Gonbade Qabus city in Golestan province. The first and earliest tower made of fired brick was inscribed as UNESCO world heritage in 2012. This place is the tomb of Qabus Ibn Voshmgir, the king of Ziyarids. It is actually built in 13th century and shows us the progress in technology of the people of that time.
The tower is 53 meters high and all made of brick. The plan is like a stellar and the toppest part (ceiling) is conical.
The tower is the only thing remained from the previous, historic city, Jorjan. The city was totally destroyed when Mongols attacked Iran and just the tower remained, thought it got damaged, it was restored later.
Some researchers say that the idea that says the tower is the grave of king is not true, because they couldn’t find any corpse inside the tower!