The Great Wall
The Great Wall is a series of fortifications made of stone, brick, rammed earth, wood, and other materials. It was 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. The Great Wall is of great architectural, historic and strategic importance. It was added to the list in December, 1987.
