The Great Wall of China
The Great Wall of China is one of the most famous landmarks in the world. It was built along the old historical borders of China to protect the Chinese empire. It was started back in the 7th century. Smaller sections were built and then they were then joined together. It is made out of many different materials. Brick, stone, wood, and other materials were used to build it. Probably the most famous part of the wall was built between 220–206 by Qin Shi Huang, the first Emperor of China, but there is not much left of this section now.
More than 10 million people visit the Great Wall of China every year. The most popular section of the Great Wall is called Badaling. This section is very popular with tourists. In fact, it has been visited by over 300 leaders and important people from all over the world. Because it is so popular, it is very busy. A study showed that main section of the wall (the Ming walls) are 6,259 kilometers long, but another study showed that all the different sections make it 21,196 kilometers long.