Beringer Vineyards is a large winery in St. Helena, California. Founded in 1875, Beringer Vineyards is "the oldest continuously operating winery in the Napa Valley", and is a California Historical Landmark. There reserve Cab is one of my favorites. The tour is informative and interesting so if its your first time I recommend it. But for regular visitors to Napa then the tastings and select wines are what you'd come here for.