Lianzhou Underground River is a giant natural cave with temperatures around 18 °C, making it great for summer vacations. The cave is divided into three layers, the upper two being comprised of land, while the bottom layer is a dark river. To explore the underground river, it is accessible by boat. The cave is filled with stalactites of various shapes and sizes, among them the Xianren Shentian, which is quite unique. The layers of stalactites are distributed like spectacular terraces.