A vast three-storey stone winery building from 1889 that now houses the West Coast campus of America's premier cooking school. The grey-tuff masonry exterior — quarried from a hillside in the valley — is impressive on its own, but the interior is also open to visitors: a ground-floor restaurant, a teaching kitchen that runs public demonstrations, and a small museum of antique corkscrews and wine artefacts.
The Gatehouse Restaurant, staffed by advanced students, serves a daily-changing menu drawing on Napa produce and is one of the better-value meals in the valley. Above it, the herb gardens and the terrace look down the valley. Free to enter and walk through; tours and classes need booking.