The Great Wall of China is the world's largest military defense structure. It towers and meanders along mountain ranges, constructed more than 2,000 years ago. It was made more brilliant by the numerous wars, power struggles, successive dynasties, political and economic historical events influencing imperial China for over 2,000 years.The everlasting value of the Great Wall comes from the architecture, with its components of the wall, gates, towns, garrisons, and signal towers, along with their artistic elements. It also derives fame from the countless classical works of poetry, folk...