Introduction to Zen Cave: Zen Cave is a natural cave. It was named because the monks in the ancient Zen Cave often meditated and chanted sutras here. The total length of the Zen Cave is more than 3,000 meters, and now more than 500 meters have been developed. The temperature inside the cave remains at about 17 degrees all year round. It is humid in the cave in summer and relatively dry in autumn, winter and spring.