Skylight introduction: The skylight is the continuous collapse of the rock layer above the karst cave due to gravity or other effects. Finally, the top of the cave communicates with the surface to form a window, which is about 8 meters long and 2 meters wide. Daylight can be filtered through the window. Directly shooting into the cave, it is like a waterfall pouring from the sky, with jade flowing light, which is very strange and spectacular.