Cradled in north Napa Valley, Calistoga became known for its healing mineral waters in the 1860s. Today, spas pamper guests with volcanic mud baths and hot-spring soaks. Calistoga offers superb wineries, such as the hilltop Sterling Vineyards, accessed by aerial tram. Nearby geologic attractions include the ancient redwoods of The Petrified Forest and the 75-foot Old Faithful Geyser of California.