Introduction to the Old Stone Chamber Ruins: When you walk into the cave, you immediately feel eerie and cool. If you shout, the echo will not disappear for a long time. The ground inside the cave is quite flat and slopes toward higher ground. The cave is nearly 100 meters deep and is the largest and deepest cave in the Daxingan Mountains. The cave is divided into three parts: the front hall, the middle hall, and the back hall. The largest front hall is the first to enter the cave. It is 20 meters high from the ground to the top of the cave and 30 meters wide. It is like a large movie theater and can accommodate gatherings of thousands of people. . The roof of the cave is completely natural and integrated with the cave wall, just like a dome shrouding it. There is a large stone slab with a diameter of 3 meters square in the middle of the cave. It is said to be used by the Xianbei people to worship their ancestors. There are indeed traces of smoke underneath.