Beijing is the capital of China and one of the most populous cities in the world. It is a major cultural, political and educational center of the country. Beijing is home to some of the most impressive landmarks in the world, including the Forbidden City, the Great Wall of China, and the Temple of Heaven. The Forbidden City is a palace complex that was the imperial palace of the Ming and Qing dynasties. It is a UNESCO World Heritage Site and is one of the most visited tourist attractions in Beijing. The complex is made up of 980 buildings, including palaces, pavilions, courtyards, gardens, and gates. The Great Wall of China is a series of fortifications that were built to protect the northern borders of the Chinese Empire. It is one of the most iconic landmarks in the world, and it is a UNESCO World Heritage Site. The wall stretches for more than 6,000 kilometers and is one of the longest man-made structures in the world. The Temple of Heaven is an imperial complex of religious buildings located in the southeastern part of Beijing. It was built in the 15th century and is a UNESCO World Heritage Site. The complex is made up of three main buildings: the Hall of Prayer for Good Harvests, the Imperial Vault of Heaven, and the Circular Mound Altar.