Listed as a UNESCO World Heritage Site since 1987, the Great Wall of China is one of the Seven Wonders of the World. Unique on our planet, this impressive construction stands like a gigantic dragon on the Chinese border. Stretching for almost 9000 kilometers from East to West, it crosses the deserts, valleys, mountains and plateaus of the country. Built about two millennia ago, some parts are left in ruins or have disappeared. Despite this, it attracts thousands of tourists every year who come to admire its architectural splendor but also to discover the legends that surround it. Originally, this construction was used as a fortification by the Yan, Zhao and Qin states to repel Hun attacks. Today, the Great Wall still plays a major role in Chinese culture as it has long been part of the mythology and symbolism of the country. Finally, to visit it, three sites stand out from the others: Badaling, Mutianyu and Simatai. All of them have special characteristics. Badaling is one of the best preserved areas of the Wall. Mutianyu has 22 guard towers commonly known as watchtowers and is full of streams and surrounding forests. Finally, Simatai remains a difficult site to access but is one of the most authentic with its original appearance dating back to the Ming Dynasty.