Fantesca Estate & Winery sits on a Spring Mountain property that was Caroline Bale's dowry when she married Charles Krug in 1860; a Cabernet Sauvignon from the site won one of Napa Valley's first wine awards in 1889, made by pioneering female winemaker Hannah Weinberger. Former Best Buy executives Susan and Duane Hoff bought the estate in 2004 and built a 280-foot cave inside what is rumored to be an old silver mine, where winemaker Heidi Barrett crafts the estate's only Chardonnay and only Spring Mountain Cabernet.