It takes six or seven minutes to take a boat from entering the hole, and then it is a walk. It takes about an hour. There are beautiful interpreters to explain the various points. The various lights and scenery are still quite good, because this is the hole that was washed out before, and then the upstream was made a dam. These holes have become what they look like today, and the natural formed caves are not the same. Generally, there are some characteristics of the attractions inside, but the time is short and the price is slightly more expensive.