Xuanwu Lake is located in Xuanwu District, Nanjing City, east pillow Zijin Mountain, west by Ming City Wall, north of Nanjing Station, south of Zhoushan, is the largest city park in Jiangnan, is also the largest royal garden lake in China, the only remaining Jiangnan royal garden, known as the "Jinling Pearl", also known as Houhu, North Lake.