Mineral Springs independent inns

Set on Boyes Boulevard just north of Sonoma's plaza, this mission-style retreat draws on a natural hot spring that feeds its mineral baths — the reason people have been coming to this patch of wine country for generations. The spa is the centerpiece, with fine dining on site for the evenings. It's a large, polished property rather than an intimate hideaway, and its 4.5-star average across more than 1,700 reviews reflects consistent resort-grade service.