When I went, I forgot to buy tickets online. It's also convenient to buy tickets at the service center. It's also good to go in without taking a ferry. It's only about 15 minutes to walk. It takes about 1.5 hours for a tour guide to explain the whole journey. The scenery is unique and worth seeing. There were photographs in it. We didn't take pictures. The exit and entrance were not the same place. It took 40 minutes to walk to the service center.