The Great Wall of China is one of the most impressive architectural structures throughout history. The Great Wall extends from Lop Lake to Dandong in the east. The Ming walls stretched across a total of 5,500 miles (8,850 km).
It is comprised of 3,889 miles (6,259 km) of actual wall, 223 miles ( 359 km) of trenches, and 1,387 miles (2,232 km) of natural barriers that included things like rivers or troublesome hills. The Great Wall is made up of stone, brick, tampered earth, wood, and related materials.
Different walls were built or updated throughout the various emperors, but history shows that construction began as early as the 7th century BC. The majority of the wall that exists today comes from the Ming Dynasty between the years 1368-1644.