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The Great Wall of China is one of the Seven Wonders of the World. The Great Wall of China is a series of stone walls and planted in northern China, built, rebuilt and maintained between the 5th Century BC to the 16th Century on the northern border of the Chinese empire to protect against attacks Xiongnu during different dynasties. With a history of more than two thousand years, it is still one of the attractive sights of the world for its architectural grandeur and historical. He entered World Heritage by UNESCO in 1987. Like a gigantic dragon, the Great Wall winds up and down across deserts, grasslands, mountains and plateaus, stretching approximately 8851. 8 km (5,500 miles) from east to west China. Tour and Travel Guide Pyramid at Giza during the Ming Dynasty, but bricks were used extensively in many areas of the wall, as well as materials such as tiles, lime and stone. The size and weight of the bricks made them easier than the earth and stone work, if the accelerated construction. In addition, the bricks could bear more weight to carry and better than mud. Stone can hold under its own weight more than the brick, but it is difficult to use. Consequently, stones cut in rectangular shapes were used for the foundation, inner and outer edge, and gateways of the wall. Line of the upper slots of the vast majority of the wall, with defensive gaps a little over 30 cm (wide with one foot) tall and about 23 cm (9 inches). Statue of Liberty – symbol of freedom and Liberty Travel Guide Facts file of the Great Wall of China * The wall receives more visitors: Badaling Great Wall * Most of the walls of the East (Ming Dynasty): Hushan Great Wall * The wall further west (Ming Dynasty ): Jiayuguan Pass * The Wall to the west (of the Han dynasty): * Pass Yumenguan The Wall is the most dangerous (Ming Dynasty): * The Great Wall Jiankou first wall: wall in the Chu State in the Warring States Period (476 BC BC – built in 221 BC). * The wall with the most architectural styles: the Great Wall in the Zhangjiakou City * The highest wall, the wall is at 2000 m (6562 feet) high mountain Huapiling bingshanliang Zhangjiakou City * The wall with built most of the castles and the wall, where the most frequent wars have taken place: the Great Wall in the Zhangjiakou City *, the first Great Wall Hiking: Liu Yutian completed in 1984 * The first foreigner to the entire length of the Great Wall: William Edgar Geil explore 1908th The Seven Wonders of the World – The Great Wall of China facts file