Dongshi Introduction: Dongshi is a small volcanic tube exposed on the surface, and its rock is volcanic breccia. The east stone towers abruptly, like a stone lion, majestic and majestic. Dongshi is the "Dongshi Er" of Aishan, which has a high function of volcanic geological investigation. Dongshi sea caves are mostly round or oval in shape and distributed irregularly. The small ones are more than 10 centimeters in diameter, and the large ones are about 1.5-2 meters in diameter and 1-2 meters deep. They can accommodate several people sitting on the ground at the same time. Not far to the northeast of Dongshi, there is a steep and straight stone pillar peak. Because it is smaller than Dongshi, it is called "Little Stone". In front of the small stone is the "Mother and Son Stone". Dongshi has now developed a mountaineering iron chain and built climbing steps.