I live within walking distance of the Japanese Friendship Garden, so I enjoy it frequently. Once inside, it's hard to believe you're still in Phoenix. That's why I was so happy when Groupon recently offered a half-price membership. I would join in a minute, except they're closed from May to October or so. Half-price membership seems about right.
The atmosphere is gentle and meditative. I feel safe sitting on a bench and actually meditating here. The koi kind of freak me out. They've been fed so often by visitors that I feel fairly certain they'd eat me if I fell into the pond. Last time I visited, there were baby ducks in the house. So cute and fluffy, and they had no fear of people.