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Tehran, is the capital of Iran and Tehran Province. With a population of surpassing 12 million in the wider metropolitan area, Tehran is Iran's largest city and urban area, and the largest city in Western Asia. The city is home to many historic mosques, churches, synagogues and Zoroastrian fire temples. However, modern structures, notably Azadi (Freedom) Tower and the Milad Tower, have come to symbolize the city.
Tehran features a semi-arid, continental climate. Tehran's climate is largely defined by its geographic location, with the towering Alborz Mountains to its north and the central desert to the south. It can be generally described as mild in the spring and autumn, hot and dry in the summer, and cold in the winter.
As a large city with significant differences in elevation among various districts, the weather is often cooler in the hilly north as compared to the flat southern part of Tehran.