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Photo: Sanfranman59, CC BY-SA 3.0 via Wikimedia Commons
Not just opera.
The Napa Valley Opera House is a historic multi-venue performance space in Napa, California currently home to Blue Note Napa and JaM Cellars Ballroom.
© OpenStreetMap contributors
Various types of train rides offered for the 36-mile round trip to St. Helena, with or without gourmet dinner. Buy the "flight" of wines at the tasting car. Make this institution part of your trip.