* Length: The Great Wall of China is approximately 21,196 kilometers (13,171 miles) long.
* Width: The Great Wall of China varies in width from 4.5 to 9 meters (15 to 30 feet).
* Height: The Great Wall of China varies in height from 6 to 7 meters (20 to 23 feet).
* Materials: The Great Wall of China is made of a variety of materials, including stone, brick, earth, and wood.
* Construction: The Great Wall of China was built over a period of more than 2,000 years, beginning in the 7th century BC.
* Purpose: The Great Wall of China was built to protect China from invaders from the north.
* UNESCO World Heritage Site: The Great Wall of China was designated a UNESCO World Heritage Site in 1987.
Other Significant Geographic Features of the Great Wall of China
* The Badaling Great Wall: The Badaling Great Wall is one of the most popular sections of the Great Wall of China and is located about 70 kilometers (43 miles) northwest of Beijing.
* The Mutianyu Great Wall: The Mutianyu Great Wall is another popular section of the Great Wall of China and is located about 90 kilometers (56 miles) northeast of Beijing.
* The Simatai Great Wall: The Simatai Great Wall is a less-visited section of the Great Wall of China and is located about 120 kilometers (75 miles) northeast of Beijing.
* The Jinshanling Great Wall: The Jinshanling Great Wall is a beautiful section of the Great Wall of China and is located about 150 kilometers (93 miles) northeast of Beijing.
* The Great Wall of China at Jiayuguan: The Great Wall of China at Jiayuguan is the westernmost end of the Great Wall of China and is located in Gansu Province.