Mazandaran  hosts world ‘s second largest defensive wall The most important brick wall in Iran This brick wall is a symbol of the north of iran defense system in the past and is one of the most important structures in this country which starts from the border of the caspian sea and leads to the surrounding areas of the zagros mountains in the northeast of iran . The destruction of the Gorgan Wall by natural factors The Gorgan wall was completely constructed in accordance with the principles of engineering andRead More