The tallest wind catcher (badgir / بادگیر‎ ) standing in Iran (and in the world) is the one in the Dolatabad Garden in Yazd. It’s 34 meters heigh.
It is a traditional Persian architectural element to create natural air-conditioning system of houses in Iranian deserts.

http://en.wikipedia.org/wiki/Windcatcher

The Dolatabad Garden - Bagh-e Dolat Abad ( باغ دولت آباد), is a beautiful complex which was constructed in 1712 and specially designed for the governor of the time, Mohammad Tagi Khan-e Yazdi to reside with his family.