No trip to the Bay Area is complete without a visit to the Old Faithful Geyser of California, a natural phenomena, located in beautiful Napa Valley. Old Faithful Geyser is one of only three Old Faithful geysers in the world, erupting approximately every 30 minutes on a yearly average. Open 365 days a year. Enjoy the geothermal exhibit hall, video room, snack bar, gift shop, picnic area, self-guided geothermal tour and the any exotic animals on the property to view and feed.