As enticing as the cable cars and cioppino of San Francisco can be, California’s Bay Area is stacked with other options for travelers seeking more rural or small-town adventures.   On an excursion south from the city along the bayside of the San Francisco Peninsula, I explored several not-to-be-missed sights. At the serene country estate of Filoli, I enjoyed a wine tasting hosted by the prestigious San Francisco Wine School. Dinner followed in the walkable town of Burlingame at an inventive plant-based restaurant started by a...