There is a vastly extended network of rivers in Iran most of which seasonally are filled with water. Some permanent rivers run from the Alborz or the Zagros to the Caspian Sea, Persian Gulf and Oman Sea.
Although Iran political structure is a republic system, it may seem different from other similar political systems. Iran political system's origin and roots are the reason beyond such a uniqueness.
Officially name: The Islamic Republic of Iran
Capital: Tehran
Largest city: Tehran
Official language: Persian
Government: Islamic republic