Japan's national treasure of kare-sansui

Quick answer：

Kare-sansui, or 'dry landscape', is a traditional Japanese garden style that emphasizes the use of rocks, sand, and sometimes gravel to represent natural landscapes. It is considered a national treasure in Japan, reflecting Zen Buddhism's emphasis on simplicity and mindfulness. These gardens are designed to evoke a sense of peace and tranquility, often with minimal maintenance required.