Postcard featuring Khajoo bridge, a bit damaged during its way to Morocco (six weeks, more or less...). It is always a pleasure to add a new country to my list. I guess it is not easy to get a postcard from Iran.
By the way, I cannot understand the postmark. 91?!? (update: see Heleen's comment).
Update 21/10/2016: I added this postcard to Maria's linky party Postcards for the weekend. It is a postcard received a long time ago, but I still think is is a very special card, and it is the first that came to my mind when I read the theme: Reflections on water.