Castle Hot Springs
A true desert oasis an hour north of Phoenix, this historic 1,100-acre ranch set in the heart of the Sonoran Desert offers private cabins and exclusive access to mineral hot springs. The staff offers directions for accessing the property via helicopter, which, in an area that has no dearth of luxury resorts, sets a new standard. The nightly rate covers all meals, service fees, and some activities including guided tours, although alcohol and spa services are excluded. Of note: the final 7 miles to the property are unpaved, and the resort recommends driving high-clearance vehicles.