The capital of Khuzestan Province, Ahvaz is built on the banks of the Karoun (Karun) River, the largest river and the only navigable waterway in Iran. Ahvaz has a desert climate and experiences hot summers and short, mild winters. Ahvaz is one of the hottest cities in Iran with summer temperatures reaching 45 to sometimes 50 degrees centigrade.
And It is famous for its two main UNSCO registered heritage; Susa, oneof oldest city in the world and Shustar Historical Hydraulic System.
Susa is one of the oldest cities in the world. Excavations have uncovered evidence of continual habitation dating back to 4200 BCE. Susa was a principal city of the Elamite,
Persian and Parthian empires (capital of the Elamites) and was originally known to the Elamites as ‘Susan’ or ‘Susun’.
The Shushtar Hydraulic System in the island city of Shushtar is a complex irrigation system that dates back to the time of the Achaemenid king Darius the Great in the 5th century BCE. Described by UNESCO “as a masterpiece of creative genius”, the Shushtar Hydraulic System involved the creation of a diversion canal on the river Karun to form a moat around the city, over which bridges and gates were built to keep away unwanted visitors.