The Great Wall of China is an ancient fortification made from cement, rocks, bricks and dirt. It has long been a source of history, mystery and wonder since its construction over 2,300 years ago. It is one of the Seven Wonders of the World and it attracts millions of visitors every year. If you want to learn more, here are 7 interesting facts about the Great Wall of China.7 Interesting Facts about the Great Wall of China1. The Great Wall is in North ChinaThe Great Wall stretches across North China from east to west. It starts in the east at Shanhaiguan in Hebei province and ends at Jiayuguan in Gansu province to the west.2. The Great Wall is the longest man-made structure in the worldWith a total length of about 21,196km (13,170 miles), the Great Wall of China is the longest man-made structure in the world.3. The Great Wall is a…