Introduction to Hoan Kiem Lake: Hoan Kiem Lake is an oval lake located in the center of the old city of Hanoi. There are tree-lined trails around the lake and the scenery is beautiful. Yushan Temple is located in the north of the lake, and there is a turtle pagoda in the south of the lake. Hoan Kiem Lake is an important landmark of Hanoi City. From the east to the south of the lake is the area where French colonial buildings are concentrated. Buildings such as Ba Ting Square and the Confucian Temple are on the west side of the lake. To the north of Hoan Kiem Lake is the traditional "Thirty-Six Streets". Each street is named according to the products traded. The intertwined and life-filled streets are very nostalgic.