ShareThis California Campus Tours Both of our facilities in California are open to the public daily. We welcome you to come and explore everything we have to offer at each location. Self-Guided Tour of Historic Greystone Enjoy a self-guided tour of the historic Greystone building, which houses Brother Timothy’s Corkscrew Collection, the Vintners Hall of Fame, The David and Judy Breitstein Collection, the Rudd Center for Professional Wine Studies, the Ghirardelli Chocolate Discovery Center, and more. College and historic information is available at our information desk. Tours of Copia Tours will be coming soon to our new Copia facility. Please check back for more details!