The Great Wall - the great wall,symbolizing chinese ancient civilization,it's one of the world's most renowned projects. it's the distance of 75 kilometers from beijing.it's highest point of BaDaLing is some 800 meters above see level. construction of the wall first began during the period of the Warring States(476-221 BC).formerly,walls were bulit at strategic points by different kingdoms to protect their northern territories.in 221 BC after the first emperor of the Qin Dynasty unified China ,he decided to have the walls linked up and extended.