The Great Wall of China - Truly great!

The Great Wall of China is the world's largest man-made structure, stretching over a formidable 6,352 km from Shanhai Pass on the Bohai Sea in the east, at the limit between "China proper" and Manchuria (Northeast China), to Lop Nur in the southeastern portion of Xinjiang Uygur Autonomous Region. Along most of its arc, it roughly delineates the border between North China and Inner Mongolia.

The Great Wall was originally a project of the Qin dynasty designed to keep out the nomadic Xiongnu invaders from the north. Some of the wall was built during the Qin, but most of it that we see today was constructed during the Ming dynasty.

Before the use of bricks, the Great Wall was mainly built from earth, stones and wood. Transporting the large quantity of materials required for construction was difficult, so builders always tried to use local resources. Over the mountain ranges, the stones of the mountain were exploited and used; while in the plains, earth was rammed into solid blocks to be used in construction.

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