Located on 12 meticulously groomed acres, this is the only world-class resort in Sonoma. Known for its glamorous old-world looks—it’s a stunning three-story replica of a California mission, built in 1927 and painted pink, plus newer wings with luxury rooms and suites—it’s even more famous for its unparalleled spa facilities. Along with naturally heated artesian mineral pools and whirlpools, it features beautiful indoor pools, a great gym, plus access to golf, tennis, and excellent white-tablecloth dining. Rooms are elegant, and many have fireplaces.