Near the village of Varangrud in the north of Tehran, there is a wonderful place which is really unbelievable in this very hot summer, a large mass of ice on a river with very cold water, I visited it some days ago, my some pics:

http://www.allempires.com/Uploads/Ice1.jpg

http://www.allempires.com/Uploads/Ice2.jpg

http://www.allempires.com/Uploads/Ice3.jpg

http://www.allempires.com/Uploads/Ice4.jpg

Wow! :)