Introduction to Nitrogen Cave: Nitrogen Cave is located in Tangbazi. The entrance of the cave is 1170 meters above sea level. It faces northeast and is about 15-20 meters high and 8 meters wide. It is an upright rectangle. The walls of the cave entrance are straight, but the cave body is twists and turns. The actual depth of the cave is 689.2 meters, making it the longest known cave in Bailu Town. The cave is dominated by erosion forms, such as gutters, caves, wall protrusions, hanging stones, etc., with a dissolution space of more than 50,000 cubic meters.