In the garden of Xuzhuang in Gulangyu Island, there is a special attraction - 12 holes. This attraction is a rockery 20 meters high. There is a passage in the rockery. The cave is very cool, and the scenery of Gulangyu from the cave is seen. It has a unique feeling of cave sky. The mountain is surrounded by twelve zodiac statues, so this attraction is called the Twelve Caves.