With this san francisco combo tour visit alcatraz island by ferry and take an audio walking tour of the infamous former prison and get all day access to the aquarium of the bay then head for the hills of napa and sonoma for a full day of wine tasting the following day in tranquil wine country youll taste award winning sonoma and napa valley varietals at four to six wineries plus enjoy a gourmet picnic this day trip by biodiesel minibus also includes a vineyard tram tour at benziger famil