The Gorgan Wall is an ancient defensive structure located in northern Iran, stretching approximately 195 kilometers. Built during the Sassanian Empire, it was designed to protect the region from invasions, particularly from the nomadic tribes of the north. The wall features a series of fortifications, watchtowers, and ditches, showcasing advanced engineering techniques of its time. Constructed between the 3rd and 7th centuries CE, the Gorgan Wall is one of the longest walls in the world, rivaling the more famous Great Wall of China. Its remnants provide valuable insights into the military strategies and architectural skills of the Sassanian Empire. Today, it is a UNESCO World Heritage site, attracting historians and tourists alike.