I will be flying from Russia back to America this Christmas and I was thinking about staying for a couple days in one of the cities where American Airlines has an international hub. Then I started to wonder, is it a good or bad thing to visit a European city over Christmas vacation? I would prefer to stay in London, but I have no idea what it is like there over Christmas. Are all of the museums and “main tourist attractions” closed for the holidays? What about the following cities in Europe where American Airlines has its international hubs: Manchester, Barcelona, Madrid, Paris, Helsinki, Frankfurt, Brussels, Zurich, Milan, and Rome.