Si-o-Se-Pol, literally meaning thirty-three bridges, is a magnificent and unique structure built over the Zayanderud River. It is also known by the name of its erector, Allah Verdi Khan, who was one of the generalissimos of Safavid dynasty.

The architecture of Si-o-Se-Pol was Master Hossein Bana Esfahani. The genius of this artist can be realized when we are informed that despite all the bridges that have been built in the narrowest part of the river, Master Hossein Bana chose widest part of Zayanderud to build Si-o-Se-Pol. The reason for his decision was that it is the shallowest part of the river, and also provides great views of the surrounding.

During history, many travelers and tourists have adored and admired Si-o-Se-Pol. Some of them are the British writer and geography scientist Percy Sykes, the French traveler Jean Chardin, and the Ambassador of King of Spain Don Garcia. They have all mentioned the many beauties of the bridge in their notes.