Bishandong is one of the main passages of Gulangyu Island. The cave is brightly lit and curved. It is full of graffiti. Walking inside, there is no need to hurry. It is interesting to see those graffiti, but it seems that painting is prohibited. Generally, most of the people staying at Gulangyu Inn will pass through Bishandong or Longshandong. There are Trinity Hall, Bishan Park and so on nearby.