Mohammad Hassan Khan bridge - Credit: Wikimedia Commons
Mohammad Hassan Khan Bridge , also known as Pol-e Mohammad Hasan Khan, lies on the Babol river in Nooshirvan Kola Road of Babol city. It is one of the ancient construction in Mazandaran Province. The bridge was constructed in the year 1146 AH. when the war between Karim Khan Zand and Mohammad Hasan Khan Qajar was over by tribal chief Mohammad Hassan Khan Qajar. Prior to its construction, in the reign of the Ghaznavids, there was a wooden bridge in the same location. Read more on Wikipedia
Source: en.wikipedia.org