San Francisco, got to be one of the most interesting US cities to visit. Filled with iconic imagery from the Golden Gate Bridge and Fisherman's Wharf to the Transamerica Pyramid building. The familiar scenes of the crazy, curvy Lombard street, the pretty painted ladies and the famous or infamous Haight Ashbury sign and all that it stood for. A city reminiscent of the sixties era in so many ways yet now so a part of the new wave of culture and technology. San Fran, you'll a real leader.