617. Go see the zen rock garden in Ryoan-Ji
Measuring about the size of a tennis court, the Ryoan-Ji garden is composed solely of 15 large and small rocks, some encircled by moss, grouped in five clusters on a bed of carefully raked white sand. From a distance, these rocks resemble islands, the sand, a tranquil sea. Research have found that the rocks, when viewed from a proper angle, evoke the outline of a branching tree. However, the anonymous designer left no explanation leaving the garden’s exact meaning a mystery (source).