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.
The Iranian wedding ceremony despite its local and regional variations, like many other rituals in the country goes back to the ancient Zoroastrian tradition. Though the concepts and theory of the marriage have changed drastically by Quran and Islamic traditions, the actual ceremonies have remained more or less the same.
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.