Plan a wellness- and wine-focused getaway in Calistoga, California.Wildflowers blooming alongside vineyards in Calistoga.Credit: Allard Schager/Getty ImagesThe Calistoga American Viticultural Area has over 50 wineries, many offering tours and tastings, including Chateau Montelena, founded in 1882 and renowned for its Chardonnay.Stay at one of the area’s luxe spa hotels for wellness treatments and on-site geothermal springs, or spend the day at a…