Introduction to the Crystal Palace: The cave is filled with calcite containing phosphate rock, which sparkles under the light and is dazzling. It is a unique scene in the Jiutian Cave. There is a "Leaning Tower of Pisa" landscape inside. There is a pond under the tower, which is as horizontal as a mirror. The dark green stone lotus leaves and blooming stone lotus flowers in the middle complement each other, which is very artistic.