Introduction to Huangya Cave: There is a natural stone cave in the middle of the east cliff. This is Huangya Cave. Climb carefully along the iron ladder at the entrance of the cave, and you will see that the entrance of the cave is small but large inside. The cave is 25 meters high, 18 meters wide and 72 meters deep. During the Anti-Japanese War, Shidong served as a material and ammunition warehouse for the Eighth Route Army Arsenal.