From the Gold Rush to the Summer of Love to the dotcom days, San Francisco has been a city of distinct neighborhoods. This savvy, entertaining guide explores the best of the city "on the ground" in tours that traverse its length and breadth. The 33 urban treks are a great way to soak up the history, culture, and vibe of the City by the Bay. The walk's commentary includes trivia about architecture, local culture, and neighborhood history, plus tips...