Highlights: Penglai Celestial Cave, also known as Luohan Cave, is a large multi-layer and multi-section cave with accumulated forms. The scenery within the cave is fantastic, and the landscape outside of the cave is beautiful. It is fascinating for the integration of the scenery both inside and outside. The "Bobbin Net Curtain," the "Heaven Silk," the "Landscape Paintings" and the "Thousand Buddha Mountain" constitute the four distinctive features in caves of Penglai, honored as the head of Shitai karst cave group. It is a natural geological museum. People often say that "Visitors who come back from Mount Huang will not be amazed at other mountains, while visitors who come back from Penglai will not look for other caves for sightseeing."