The Trans-Iranian Railway is a major railway system in Iran that connects the northern and southern parts of the country. Completed in 1938, it spans approximately 1,400 kilometers, linking the Caspian Sea in the north to the Persian Gulf in the south. This railway plays a crucial role in facilitating trade and transportation within Iran and with neighboring countries. The construction of the Trans-Iranian Railway was a significant engineering achievement, involving challenging terrain and diverse climates. It was initiated under the rule of Reza Shah Pahlavi, aiming to modernize Iran's infrastructure and promote economic development. Today, it remains an essential part of Iran's transportation network.