I'm going to London, England (and spending two days in Paris) in March for a week. I'm thinking about how I'd manage my money over there. Converting my money is a huge hassle, and they always put a fee on top of that. So I'm wondering, is VISA credit cards widely accepted in London and Paris, like it is in the United States? Because I am thinking maybe I can avoid the conversion fee and hassles by simply using my credit card everywhere? Any thoughts?