Si-o-Se Pol was built in 1632 and is known as one of the most famous bridges of Isfahan. The Name Si-o-Se means thirty-three and refers to the 33 spans of the Bridge. Actually it was used to cross the Zayandeh Rud [eng.: life-giving river], but for 2 years the government keeps the dams closed so you won't see the river in the following Pictures. There are eleven more bridges like this one, another really famous one is Pol-e Khaju.