Just in time for the off-season of tourism, there are few people. This is a boat tour, about half an hour. There is a commentary on the boat, with three days and three nights as the main line, in fact, there will be a skylight every other section inside the cave, penetrating the sunshine is the so-called day, no light is the night. Because it is a dry season in winter, so three sections can go in. It is said that when you have more water, the last hole may not go in. Sometimes even the whole hole will be flooded.