Among wine enthusiasts, Napa Valley's climate is known to be best suited for growing the cabernet sauvignon grapes. In my opinion, nowhere else in the valley is this climate utilized better than Clos Du Val
where you're assured to get the best wine for your money. It's not necessarily cheap, but it's good.
The tasting room is a dark, cool, cavernous, room where one can taste a flight of wines for $5 per person.
Picnic grounds are available; this is a great place to bring a spread and relax, as the winery is set off the main road a bit.