Introduction to the Lotus Hall: There is a light red stalactite hanging from the top of this cave, which looks like a big lotus in bud, hence the name. Crystal water drops are constantly dripping from the stamens, even if it doesn't rain for several months, it never stops. On the left side of the hall, there is a stalactite about 2 meters high like the kind-faced Guanyin Bodhisattva, followed by dozens of about 10 meters tall. The guarding stalagmites; in the semicircular pool in the southeast of the hall, there are several soluble stones that are half-covered and half-exposed, with red and yellow insides, and wisps of blood, which are clearly identifiable. According to scientific analysis, it is caused by the copper element contained in the soluble stones.