Chinese Great Wall
One of the most famous sights in the world really charming and fascinating history as well. The Great Wall of China, with over 8000 km long, consists of several sections which extend in eight provinces of northern China and, making a long winding path of steep craggy mountains, immerse yourself in a fantastic setting in a position to exercise particular appeal to visitors. Its construction began in the third century BC (about 215 BC) by Emperor Qin Shi Huangdi, the same to whom we owe the so-called Terracotta Army of Xi'an and the still untouched burial mound and e is now counted among the world's settemeraviglie well as between the heritage world of humanity. Built of stone, brick, clay, wood and other materials, the Great Wall was originally built mainly to protect the northern borders of the empire and its Member prototypes against intrusions of various nomadic groups and against military incursions by various warlike peoples, not least the Mongols. Despite the grandeur that characterizes the structure was not very effective for these purposes, because the invaders often managed to exploit weaknesses represented by doors that must be, the wall should have. Among other objects of the Great Wall, there was the practice of border control: different points of the structure allowed the various imperial governments of China and to control various taxing goods transported along the Silk Road, in addition to controlling immigration and the 'emigration. The defensive characteristics of the Great Wall were strengthened over time, with the addition of watch towers, barracks and stations a garrison of troops and today is a must for travelers to visit in northern China.