The arch at the center of the sprawling Mission-style building frames the lawn and the vineyard behind, inviting a stroll under the lovely arcades. You can head for one of the two tasting rooms, but if you've not toured a winery before, the Signature Tour and Tasting ($30) is a good way to learn about enology, as well as the late Robert Mondavi's role in California wine making. Those new to tasting and mystified by all that swirling and sniffing should consider the 45-minute
Wine Tasting Basics experience ($20). Serious wine lovers should opt for the one-hour $55 Exclusive Cellar tasting, during which a server pours and explains limited-production, reserve, and older-vintage wines. Concerts, mostly jazz and R&B, take place in summer on the lawn; call ahead for tickets.