The Spa at MacArthur

The Spa at MacArthur sits at 29 E MacArthur St in Sonoma, part of the Napa Valley wine country circuit. It's a day spa open to both hotel guests and outside visitors, with six treatments on the menu and a day pass option for anyone who wants access to the facilities without booking a service.

The layout includes an indoor relaxation lounge and an outdoor Relaxation Garden, plus a co-ed steam room and a whirlpool hot tub for soaking between treatments. Separate men's and women's locker rooms handle changing, and private outdoor treatment areas are available for those who book services there rather than indoors. A small retail space sits near the entrance for anyone browsing on the way out.

The signature offering is called Sanctuary of Flowers, priced at $380, which puts this spa solidly in the luxury tier. Couples treatments are also on the menu, making it a reasonable pick for a pair looking to book side by side rather than separately.

Hours run 9am to 7pm every day of the week, with no distinction between weekdays and weekends. Walk-ins are welcome, which matters for travelers in the area who didn't plan a spa day in advance but want to use the garden, steam room, or hot tub, or book one of the six treatments on offer.