The Great Wall: a name so simple, yet so powerful. It stretches for 5,500 miles across China, and its most beautiful section happens to be easily accessible—within 70 miles of Beijing. While much of what is visible today was built during the Ming Dynasty (1368–1644), construction began on various sections as far back as 770 B.C. Credit goes to the million slaves and prisoners of war who carried blocks of granite, bricks, stones, and dirt on their backs up to the top of the ridgelines.