Zen Buddhism and Karesansui

Quick answer：

Zen Buddhism, also known as Chan Buddhism in China, is a major school of Mahayana Buddhism that emphasizes direct, intuitive insight into one's nature. Karesansui, or 'dry landscape,' is a Japanese Zen garden design that uses rock, sand, and sometimes gravel to represent natural landscapes. It is a reflection of Zen philosophy, promoting contemplation and mindfulness.