The mountains between Calistoga and Santa Rosa, leading through the Anderson Valley, are full of petrified forest rocks, but the best place to appreciate this geology is at the privately owned Petrified Forest. See the link below. This place has the distinction of having been visited by Robert Lewis Stevenson and is described in his "Silverado Squatters".
Calistoga: Spa Town in the Wine Country
Nestled among the hills of California's Wine Country, this town is known for spas and other therapeutic and relaxing places to go. It's very laid back and rather quaint.
"The Wine Country"
Surrounding Calistoga is some of California's most gorgeous, rustic scenery. One of my favorite places is the Robert Louis Stevenson State Park, to the northeast. All along the roads are vineyards and wineries.
The Old Faithful of California
The Geysir is located on the northern side of Calistoga in the Tubbs Lane. Every 30 minutes it is spitting out water for several minutes. This reliability of repeating the event has given it its name, the 'Old Faithful'. Just three 'faithful' Geysirs exist, this one is the only in California. To visit it, you will have to pay an entrance fee of 8 Dollar, which allow you to step inside the geothemal area. In my opinion it is expensive compared to the State Parks, but interesting.
Wow, it is a periode of some minutes each 30 minutes the Old Faithful is doing its show for the tourists.
The area with the mountains in the background is very nice.
People are waiting for another periode of the Geysirs spitting.