A deep-seated nostalgia resides in San Francisco—that foggy city by the bay, whose enigmatic charm, hilly streets, and welcoming wharf never fail to captivate visitors. Less so today, perhaps. But still. Strolling the streets leisurely, one is greeted by gorgeously vintage, stepped Victorian rows, crested with ornate trim and balusters, displaying old-time, bygone elegance. Lost in wonder, one would rather walk through than drive. Sure, the hills present a daunting challenge, the slanted sidewalks making knees wobble, but that is rewarded with a view of the brisk harbor like no other. And if the hike proves too much, there are antique cable cars still gracing the lanes. Wandering San Francisco, one loses track of time. A bustling Chinatown harks back to past ages of the 19th century. Reaching the wharf, with its colorfully prominent place in American history, the inviting embarcadero tantalizes with seafood nooks lined up—some little more than cozy stalls …