Introduction to the underground cable car: Biyun Cave is located halfway up the mountain. The scenic spot has specially set up a underground cable car to facilitate tourists to go up the mountain. The slope of the cable car is 21.7°, and it can rise 80 meters vertically. The running distance is up to 200 meters. The time to go up the mountain is only It takes 4 minutes, is thrilling, and blends movement with stillness.