Zen gardens are some of the most famous examples of Japanese gardens. Originally invented by Japanese monks as early as the 700s, they are now iconic and popular around the world. Other names for Zen gardens include mediation gardens and Japanese rock gardens. Stones, sand and gravel are the most important features of these gardens, though they can also include bridges, water features and plants. At a glance, these gardens look simple and subdued but they are packed with meaning. The essence is a calming space for meditation that evokes natural landscapes on a small scale, which makes them a great choice for gardeners looking for a peaceful retreat in the comfort of their own home. Compared to other types of Japanese gardens, Zen gardens can be successfully created in small spaces and have low maintenance.