An impression of a Japanese Buddhist Zen Garden and how it gets maintained and improved continuously.
The garden is fully documented by means of a free online guide for creating a karesansui Zen garden.
The site authors are based in the Netherlands, where they have created this garden named Tsubo-en.
The site http://www.zen-garden.org/ discusses how to create and maintain such a garden. There, on the Introduction page, you will find the full version of the next citation abstract:

"A space that embodies nature can act as a kind of balm - a restorative for the mind. In its ideal form, the modern Japanese garden is just that spiritual space, designed according to a sophisticated aesthetic that evokes and celebrates nature."