Portland, OR - A garden paradise

About a half-hour northwest of downtown Portland in the hills that ring the area I found one of the most interesting and beautiful labyrinths I've ever seen. Even now, a few days later, I still think that's the case. It's on a private estate with a gorgeous valley view. And the pattern is different - it's a seven-circuit one but it's an elaborate garden throughout. I saw so many treasures at different points, botanical and design varieties alike. At the center was a rock that simply said 'Serenity', which seemed fitting for this peaceful place.