Huang long Cave is located in Zhangjiajie scenery area, Hunan Province. It one of the top six most beautiful show caves in China. It was known for its fantastic stone fields and stalagmite, called sacred needle for stabilizing the sea. Huanglong Cave is also called a fairyland underground. The stalagmites inside the cave were everywhere and of all kinds of different shapes. Some featured stone and stalagmites were named by people based on their shape, like stone shoots, stone curtains and stone flowers. Due to the great ornamental value of the Huanglong, it is now well protected and an interesting thing is the highest stalagmite was insured 100 million yuan since it was regarded as a miracle in the subterranean.