Introduction to Grotto No. 24: Grotto No. 24 is a water grotto. The entrance of the cave opens to the mountain road. It is flat rectangular in shape, about 50 meters wide and 30 meters high. There are six large square stone pillars in the cave that can be hugged by three people, arranged in two rows. The formation supports the top of the cave, with four layers extending into the ground, hence the name "Twenty-Four Roots". There is water in the cave, which is bottomless. There are red, yellow, blue, white and black swimming fish in the water, and their shapes are many strange.