Siwand Bridge Marvdasht

The remains of Siwand Bridge, dating back to the Sassanid era, are one of the tourist attractions of Marvdasht and are located on the banks of the Polvar River. This site was registered as one of Iran's national monuments on February 19, 2008. The bridge had multiple spans of various sizes, some main and some secondary. The southern piers of the bridge were shaped triangularly to break the water pressure against the flow direction and apparently circularly in the other direction.