In the spring of 1998, a treasured storage was found and saw the light of day after thousands of years beside the bank of JuMa River. It is the "Immortal Cave", which has a distance of 100 kilometers away the Third-Ring road around Beijing City.


    Initial imploration proves that the cave, more than 4 thousand meters long, can be divided into three floors underground. It is spacious and deep, in which many hidden rivers' source can't be found. Now about 900 meters have been developed and open to visitors. In addition, visitors can also enjoy a water tour underground.