Hanoi Hoan Kiem Lake is located in the old town. The legends about it are inseparable from the four characters of Lake, Baojian, Big Turtle and Li Taizu, so it is named. The lake is oval, the lake is clear and clean, the trees around the lake shore are green, and the environment is quiet and elegant. Many Vietnamese students are often seen taking pictures with drawing boards there and taking serious pictures there, and it is also a good place for locals to take a leisure walk.