Ryōan-ji 竜安寺is a Zen temple located in northwest Kyoto, Japan. Belonging to the Myoshin-ji school of the Rinzai branch of Zen Buddhism, the temple is one of the Historic Monuments of Ancient Kyoto, a UNESCO World Heritage Site.
The famous rock garden is thought to have been built in the late 1400s. It consists of raked gravel and fifteen moss-covered boulders, which are placed so that, when looking at the garden from any angle (other than from above) only fourteen of the boulders are visible at one time. It is traditionally said that only through attaining enlightenment would one be able to view the fifteenth boulder.