<p>Chongming Island, the largest sand island in the world</p><p>The biggest is the Great Pyramid of Khufu, which is the first of the seven wonders of the ancient world.</p><p>Potala Palace, the highest grand building complex</p><p>The Forbidden City is the largest, most magnificent and well preserved ancient palace and ancient architectural complex</p><p>The world's highest peak -- Everest is the main peak of Himalayas</p><p>The smallest surviving Koran in the world</p><p>The highest sightseeing elevator in the world -- Bailong tourist elevator built in Wulingyuan scenic spot, Zhangjiajie, Hunan Province</p><p>Saturn, the most beautiful planet</p><p>Sahara, the largest desert in the world</p><p>Lake Superior, the largest freshwater lake in the world</p><p>The sweetest leaf -- there is a perennial herb in Compositae, named Stevia rebaudiana</p><p>The first people to arrive in Antarctica -- American Palmer</p><p>The largest mosque: Shah Faisal mosque in Islamabad, Pakistan</p><p>The longest wall -- the great wall of China</p><p>The earliest subway in the world was in London in 1863</p><p>Britain: the country with the longest subway</p><p>The shortest subway: Istanbul subway in Turkey</p><p>The subway with the largest passenger volume -- San Francisco subway</p><p>The deepest subway: the subway in Pyongyang, North Korea</p><p>The most convenient subway: the subway in Moscow</p><p>The most luxurious subway: the subway in Paris, France</p><p>Leshan Buddha, the largest stone Buddha in the world</p><p>Guanyan scenic spot of Lijiang River, a new tourist attraction in Guilin, has won two Guinness World Records: the longest way to visit caves and the longest tourist slide</p><p>China: the first country to invent compass</p><p>The largest hydropower station in the world - Itaipu Hydropower Station</p>