Tasting wine is a favorite pastime that's enjoyable pretty much anywhere, but especially so when there's a funky old Airstream involved. The Grade Cellars specializes in harvesting Sauvignon Blanc. During your visit, sip wines paired with views (and even fire up the barbecue!) while kicking back at the trailer. Founders Tom Thornton and Brenda Mixson often show visitors around the 32-acre vineyard, which is situated just north of Calistoga at the foot of Mount Saint Helena.