Beijing

1. Beijing is home to the world's largest palace complex, the Forbidden City, which consists of approximately 980 buildings and covers about 180 acres. 2. The city features a unique blend of modern and traditional architecture, including ancient temples like the Temple of Heaven, which is a UNESCO World Heritage site and an important symbol of Chinese culture. 3. Beijing has an extensive underground city built during the Cold War, which was designed as a fallout shelter and spans over 85 square kilometers, with sections still accessible to the public today.