This is the quintessential Sonoma winery—relaxed and playful, yet wine obsessed. It’s the oldest continually running family-owned and -operated winery in California, plus it’s got great wines to try and the best picnic grounds in the valley. (Hike to the top of Towles’ Hill for a sensational view.) Fantastic additional activities (Midsummer Mozart Festival, film fests) give even more reason to find out what’s going on at GB.