Shanhaiguan is a district located in the city of Qinhuangdao, in the province of Hebei, China. It is a historically significant area, as it is home to the Shanhaiguan Pass, which is often referred to as the "First Pass Under Heaven." This pass served as the eastern end of the Great Wall of China and was an important military stronghold in ancient times. The district is known for its beautiful natural scenery, with the Bohai Sea to the south and the Yanshan Mountains to the north. The area is also home to several popular tourist attractions, including the Old Dragon's Head, where the Great Wall meets the sea, and the First Pass Under Heaven Museum, which showcases the history and significance of the Shanhaiguan Pass.