Old Faithful Geyser of California. Like its more famous Yellowstone counterpart, this Napa Valley geyser erupts at regular intervals - every forty minutes. A visitor writes, "The geyser erupts every 10 minutes, and while small, it is still a unique experience." The geyser is a few miles north of Calistoga and has tables for a picnic with a small gift shop.
Island Park Recreation Area is the place to go for campers looking for lots of exciting water activities at Pine Flat Lake. The area has plenty of campsites plus two group sites and a day-use area for boaters.