It may measure less than 130 square kilometers, but San Francisco justly ranks as one of the greatest cities in the world. Famous for grand-dame Victorians, classic cable cars, dynamic diversity, a beautiful waterfront, and a soaring crimson bridge, the “City by the Bay” truly has it all. Trend-defining cuisine ranging from Michelin-starred dining to outrageous food trucks; world-renowned symphony, ballet, theater, and opera; plus almost boundless outdoor…