On November 10, 1970, exactly 47 years ago today, the Great Wall of Chine was opened to world of tourism for the first time.
The wall consists of series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe.
Defense aside, other purposes of the Great Wall are border controls, allowing the imposition of duties on goods transported along the Silk Road, regulation or encouragement of trade and the control of immigration and emigration.
The great wall has remained a global landmark for tourists from all over the world.
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