Karesansui, or dry landscape, is a traditional Japanese Zen garden design that uses carefully arranged rocks, sand, and sometimes moss. It is not meant to be used casually as the term implies a specific aesthetic and philosophical significance. The practice of karesansui requires a deep understanding of Zen Buddhism and Japanese culture. It is an art form that embodies simplicity, balance, and the natural beauty of nature, and is often used as a form of meditation and reflection.