Introduction to Black Dragon Cave: Black Dragon Cave is actually a structural mountain gap with a wide and unpredictable entrance. According to legend, there is a dragon lurking in the cave, which can cause clouds and rain. The constant-temperature steam rising from the bottom of the cave gives different impressions throughout the year. In mid-summer, there is air-conditioning rising up. When people stand at the entrance of the cave, they suddenly feel the cold air biting their bones. Today, we have only explored the cave to a depth of more than 60 meters, with a horizontal distance of more than 100 meters, and the entrance to the cave is submerged in water.