First north to Bat Cave, about 2 kilometers away from Bat Cave, the country road completely replaced the asphalt road, full of rubble, pits. Before entering the hole, you must rent an emergency light in your hand, because there is no light inside, and there is no trace of manual chiselling, completely natural. The exit is very small, and it is wet everywhere, which is very difficult to climb. After climbing up, the clothes will become black.