yes gardens are good focus for meditation
Zen gardens reflect the form and emptiness of the world. Their form is often lush plants interspersed with spaces (often of stones) without plants representing emptiness. They are designed to promote peace and tranquility and to foster spiritual awakening. .
Zen came to the West from Japan. There are many Zen temples in Japan.
The term "Zen Gardens" is a Western concoction. The Japanese never refer to them as such but call them 枯山水 karesansui, "dry landscape" gardens (lit. dry, mountain & water). These gardens actually existed in Japan before the arrival of Zen Buddhism (the oldest remaining gardens date from the Heian period, 784-1185 AD).
Zen Buddhists meditate in Temples.
when you complete adventure mode
To unlock Zen gardens you must complete level 5-4 in adventure mode. Then you just have to click on watering can icon in main menu.
Zen gardens, or "karesansui," are distinguished from other Japanese gardens by their minimalist design, which emphasizes the use of gravel, rocks, and sand to create abstract representations of nature rather than lush plant life. The arrangement of these elements is intended to promote meditation and contemplation, reflecting Zen Buddhist principles. Unlike more botanical gardens that showcase a variety of plants and water features, Zen gardens focus on simplicity and the aesthetic of space, encouraging introspection and a connection to nature through a serene environment.
I don't know, but there are a lot of Zen temples in Kyoto, Japan. I doubt they'd express it using the word "holy" but so many temples has to make it pretty special. As well as Kyoto, Kamakura near Tokyo has many very important Zen temples. This reflects that the Kamakura era was the start of the "Shogun era"...and Zen Buddhism was very popular among Samurai.
Sand gardens, also known as Zen gardens or dry landscapes, are minimalist outdoor spaces that use sand, gravel, rocks, and occasionally plants to create a serene and meditative environment. Typically associated with Japanese culture, these gardens often feature carefully raked patterns in the sand or gravel to symbolize rippling water, promoting contemplation and tranquility. They serve as a space for reflection and can be found in various settings, including temples and private homes. The simplicity and design are meant to evoke a sense of peace and mindfulness.
Zen gardens are an aid to meditation. they accomplish this by providing enough stimulation for the senses to keep them focused without wandering, while avoiding the clutter of fine detail that is distracting. Meditation is a valued tool for achieving insight in Zen Buddhism.
Zen Buddhism
You could get any null in any place by going to that particular place and 'attune' the null/use it to go to null chamber. When you use the null to zen gardens, it will lead you there.