Bay seniors fleeing the summer fog will find a garden of delights south of Sonoma on 121. Slow down when you see a white picket fence rippling in waves and a 30-foot high Adirondack chair. Cornerstone is set amid Carneros vineyards. Edgy landscape architects from around the world have created a series of outdoor “rooms” that change annually. Fields of pinwheels, wire clouds dripping with crystals are a few of this year’s contributions. All in all, it is what in our youth we called “mind blowing.” Steps away are chic rural shops and refreshments. Free.