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 .