uilt over a century ago in 1880 by Napa Valley winegrower William Castner, the historic stone building that houses Flying Horse Winery is one of only a few remaining ghost wineries in St. Helena and includes a yet-uncovered wine cave dug into an adjacent hillside. These beautiful buildings were built mostly during the post-Gold Rush years, when San Francisco's wealthy helped to increase the demand for fine wine, for which the Napa Valley was a convenient and high-quality source. When Prohibition was signed into law in 1920, almost every Napa Valley winery was closed except for those that provided medicinal or sacramental wines for churches. Mr. Castner's winery was no exception: the winery was closed, the wine cave was sealed, and the building was eventually converted into a residence. It was rediscovered by Bryant Morris, owner of Flying Horse Winery. Bryant saw the potential of the building and the surrounding property, and is in the process of restoring them to their original beauty.