There is a bridge between Qazvin and Bouin Zahra that was built in Shah Abbas and it is 37km away from Qazvin. It has three entrances, two entrances are greater with 7.5m width. Threefold entrances have sharp arches. The least width of pillars is 4m. the most raised of bridge is between two great arches. Lower parts and bridge's pillar has been built by stone and a concrete of lime and upper parts has been built by bricks. The width of bridge is about 4.70m and it length is about 52m.