Loveliest setting: A three-way tie

Korbel Champagne Cellars (pictured), for its soaring redwoods and view of fields and mountains.

Iron Horse, for its rustic freestanding bar fashioned from long planks, where you taste wine under an open roof right next to undulating vineyards.

Schramsberg Vineyards, for the lush beauty of its mountain foliage and the way its dark redwood buildings disappear into the forest.