Why is The Great Wall of China famous?

It is the longest wall all over the world. The total length of the Great Wall of China built in different dynasties is 21,196.18 kilometers. The Great Wall of China can't be seen from space by the human eye without aid. The wall is becoming shorter and shorter day by day due to the natural erosion and human activity. The Great Wall is the best place for enjoying the vacation with family and with friends. There are so many travel companies are available to help travellers. When I had gone to China one travel company Greatwall Trekclub helped me to travel the Great wall.