Zanjan province has many old and ancient, historical bridges such as Meer Bahaudin Zanjan (Mir Baha'ddin Bridge) on the Zanjan Rood or Zanjan River (Zanjanrud). The Sandar Bridge (Pol-e Sardar) south of the city of Zanjan and the Haj Seyed Mohammad Bridge south east of Zanjan which is a remnant of the Qajar era.