Dagu Fort is a historical military fortification located near the entrance of the Bohai Sea in Tianjin, China. Built in the 19th century, it was designed to protect the region from foreign invasions and played a significant role during the Second Opium War. The fort features traditional Chinese architectural elements and is surrounded by scenic landscapes. Today, Dagu Fort serves as a popular tourist attraction, offering visitors a glimpse into China's military history. The site includes various structures, such as watchtowers and barracks, and provides educational exhibits about its historical significance and the conflicts that shaped the area.