The Fairmont Sonoma Mission Inn & Spa is one of the few hotels in the United States to feature natural hot-springs mineral waters flowing directly beneath it, filling its pools and spa. (The Bathing Ritual is a must, as are the signature Kur treatments.) The hotel offers exquisitely manicured grounds and beautifully appointed guestrooms, many with fireplaces. Play the 18-hole championship golf course, join a water yoga class or daily guided morning hike, or follow one of the concierge-designed tours of Sonoma. Enjoy a complimentary wine tasting in the living room–style lobby before your inspired dinner at Michelin-star Santé restaurant.