Underground dry landscape gardening

Quick answer：

Underground dry landscape gardening is a unique form of Japanese Zen garden known as 'Karesansui' or 'dry landscape'. It involves creating a serene, minimalist garden with raked pebbles and gravel, typically found above ground. However, in the case of 'Underground dry landscape gardening', this technique is adapted to be constructed beneath the ground level, offering a unique and immersive experience. It often incorporates natural light and artificial elements to enhance the ambiance and create a sense of depth.