The Cayetano Juárez Adobe is the oldest building in Napa, a two-storey thick-walled adobe house built in the 1840s when this land was still part of Mexican California. It has spent most of the past century as a restaurant — currently Old Adobe Bar & Grill — and the dining rooms occupy the original adobe rooms, with their low ceilings and deep window reveals intact.
It's a working restaurant rather than a museum, so the easiest way to visit is over lunch or dinner. The building sits at the eastern edge of central Napa on Soscol Avenue; the Mexican-American menu fits the setting, and the historical character of the rooms is the main reason to come.