If you head down to Fisherman's Wharf in San Francisco, there are a few dishes you're bound to find. Creamy clam chowder is a big one, and most tables contain sourdough bread from Boudin. Dungeness crab and shellfish are also very common, with some showing up seasonally due to restricted fishing seasons.
One dish that is always there any time of year, however, is cioppino. You'll likely never see this flavorful soup vanish from the wharf, due in part to the fact that it originated there, even though it's Italian in name.