The famous landscape of Peking University is "One Tower Lake Map". The "tower" in "One Tower Lake Map" refers to "Boya Tower". Boya Tower was originally built to solve the drinking water problem of all teachers and students in the school. Later it was abandoned with tap water. Although it is a water tower, it has doors and windows, murals and reliefs, which look like a real tower. The "lake" in "One Tower Lake Map" is the famous "unnamed lake". The lake is green with an island in the middle. The bridge connects the north shore and the middle island, which is a good place for Peking University students to take a leisurely walk. The "map" in "One Tower Lake Map" is Peking University Library.