Local special ingredients on Cape Cod I will be spending some time on Cape Cod and since I'm from a landlocked country, I wonder what local ingredients I could take advantage when cooking during my stay. I suppose seafood and fish are in good supply, though probably still not cheap. Is there anything else worth hunting for? What are some typical dishes in the wider area utilizing local ingredients?
When I lived in Boston, and occasionally visited the Cape Cod area, there was more of a regional cuisine than local ingredients. Seafood -- lobster, fish, clams, mussels -- is the most uniquely Cape Cod ingredient I can think of, since it is right on the coast.

This infographic describes some of the foods that are associated with New England, although that is a little too general for your question -- dairy, for example, is much more a Vermont or non-coastal ingredient. However, Cape Cod is close enough that Vermont cheddar will be quite easy to come by!