Cal-a-Vie Vista, California.

Cal-a-Vie Health Spa is a transplant of the French countryside into the hills of Vista. The retreat is defined by its collection of imported historical structures, including a 17th-century chapel from Dijon and a 400-year-old limestone greenhouse used for events. With only 32 villas—each outfitted with reclaimed wood floors and French antiques—the atmosphere remains quiet and highly personalized. This is a destination for rigorous wellness; guests follow custom plans that balance high-intensity fitness and hikes through lavender fields with medical services like IV hydration and acupuncture. It is also notably the only destination spa in the world with its own private 18-hole golf course. Evenings lean into European tradition, with multi-course meals served in a formal dining room and private-label wines sourced from the property’s own vineyards.