THE GREAT WALL Of CHINA The great wall of China is the longest structure ever built. Its length is about 4,000 miles ( 6,400 kilometers ), and it was erected by hand, the wall crosses northern China between the east coast, and north-central China. Over the centuries various rulers built walls to protect their northern border against invaders. Some of the walls stood on or near the sight of the great wall. Most of what is now called the …showed first 75 words of 495 total…

…showed last 75 words of 495 total…