One stands amidst the mountains, and the other in the city center. These two ancient and modern architectures, at similar altitudes, gaze at each other from a distance of 50 kilometers. Standing on the No. 18 Watchtower and looking towards the city on a clear day, you can capture the unique scene of China Zun and the Great Wall in the same frame, marking the most distinctive experience of the Great Wall. From No.18 Watchtower, looking towards the city on a day with high visibility, China Zun is clearly visible, gazing afar at the Mutianyu Great Wall, making it the most unique spot to take photos.