California's oldest family-run winery looks like a castle, but has a down-to-earth vibe. Founded 1858 by a Bavarian immigrant, its signatures are gewürztraminer and pinot noir, but ‘Gun-Bun’ was the first American winery to produce 100% merlot. Down a winding lane, it’s a terrific bike-to winery, with picnicking, hiking and a lake. Tour the 2000-barrel cave ($20) by reservation only. Bottles are $22 to $45.
