Ryōan-ji

Ryōan-ji is a Zen temple located in northwest Kyoto, Japan. It belongs to the Myōshin-ji school of the Rinzai branch of Zen Buddhism. The Ryōan-ji garden is considered one of the finest surviving examples of kare-sansui ("dry landscape"), a refined type of Japanese Zen temple garden design generally featuring distinctive larger rock formations arranged amidst a sweep of smooth pebbles (small, carefully selected polished river rocks) raked into linear patterns that facilitate meditation.

From Wikipedia · CC BY-SA 4.0