Complete with four hot spring pools, extensive spa facilities, and cozy rooms, Calistoga Spa Hot Springs offers everything from volcanic ash mud baths to nighttime swims in geothermal pools.

Just 50 miles from San Francisco, the area includes Calistoga, known for geothermal hot springs, mud baths, and spas as well as charming St. Helena, and stylish Yountville. These $4-million Luxury ...