Well , this large bridge is called "Mohammad Hassan Khan Bridge" and is one of the most historical and ancient bridges in north Iran .

It was constructed in 1146 AH and in the beginning of KArim Khan Zand 1 emperor in Iran .  

This bridge join 2 side of  Babol Rood River. with the 

and really interesting note about this bridge is that The length of  bridge is 140 meter . and is to the width of 6 meter . also it  has 7 main aches and 2 smaller ones to the height of 11 meter .

very interesting  note about this bridge is : they used egg as one of the materials for this bridge .

wish you enjoy this .