Palmaz Vineyards is a family-owned and -operated gravity-flow, gravity-finish winery and historic estate at the southern end of Napa Valley. The estate’s centerpiece is the Cave, an 18-story, 100,000-square-foot subterranean winery that required seven years to complete. There, the family combines the latest technology with time-honored craftsmanship to make, among much else, their signature Palmaz Cabernet Sauvignon.