Introduction to Grotto No. 2: Grotto No. 2 is located halfway up the mountain, with the entrance of the cave opening like a tiger's mouth. After entering the cave, as it goes down the slope, the cool air soaks in. Looking back at the entrance of the cave, it is already filled with mist. There are dozens of stone pillars standing proudly in the cave, forming an underground corridor 80 meters long, 1.5 meters wide and 4 meters high. There is a square opening on the right side. Once you enter, you will know that there is a corridor within the corridor. It runs in the same direction, but is deeper, a hundred meters deep, and the water is emerald green.