Tian'anmen Square occupies an area of 49 hectares (122 acres), big enough to hold half a million people. It was named after the Tiananmen which stands on its north side, separating it from the Forbidden City.
The Great Wall is a series of stone and earthen fortifications, built, rebuilt, and maintained between the 6th century BC and the 16th century to protect the northern borders of the Chinese Empire from Xiongnu attacks.
The Ming Dynasty Tombs are located some 50 kilometers due North of Beijing at a specially selected site. The site was chosen by the third Ming Dynasty emperor Yongle (1402-1424), who moved the capital from Nanjing to Beijing.