The Marco Polo Bridge, also known as the Lugou Bridge, is a historic stone bridge located in Beijing, China. It spans the Yongding River and was originally built during the Liao Dynasty in the 12th century. The bridge is famous for its intricate carvings and numerous stone lions that line its sides. The bridge gained international attention in 1937 when it became the site of the Marco Polo Bridge Incident, which marked the beginning of the Second Sino-Japanese War. Today, it serves as a popular tourist attraction, showcasing both its architectural beauty and historical significance.