It is an arch-shaped bridge with a beautiful name both in the image and the scenery. The arched floor of the bridge looks like a rainbow and the arched door hole is like a half moon. Thus, the bridge got its name Rainbow-moon. This bridge is located in the most crucial part of the garden and divides the park into two areas, the former and the latter. Therefore, it prevents the visitors from seeing throughout the garden at a glance, creates visual depth, and serves as an obstacle to the view. This is a common technique used in garden design, called “blocking of the scenery.” The low and dark cave path formed by coral reefs under the bridge connects to the cave of monkey and Guan-Jia Hall.