One of the top beautiful temple complex gardens I’ve seen in Japan was at Ryoanji temple, in Kyoto, including the famous zen garden inside. Some indications of how to get to Ryoanji temple.
Really simple, sand and fifteen rocks. It is not clear the purpose of that arrangement nowadays, and we should go back to the Muromachi era and ask the designers. It is said it has a connection with the tea ceremony and zen.
The visit isn’t only the Ryoanji zen garden of the temple, but the temple itself and the surrounding gardens are a must for a peaceful walk. I took a series of photos during spring and sakura season, that was beatiful.