Planned an 18 day trip to do a quick tour of Western Europe. Barcelona, Milan, London, Dublin, Paris I've backpacked for a couple months before through Barcelona, London and Paris so I've seen quite a bit of those places, but this time is quick, about 4 days in each stop. So, although I've checked frommers etc etc, I'm looking for suggestions from forum members for things to check out. Obviously in 4 days I won't check them all out, but if a few things keep recurring, I'll make some time for them. Especially Milan and Dublin since I've no idea outside of travel guide suggestions. Thanks for the suggestions.