English language is most widespreaded language in the world. There're a lot of english-speaking countries and nationalities. I can say that for non-english speaker visiting one of those countries could be unforgettable experience. Visiting those countries can help you to communicate to different people, so you can practise your English, and see how they use different modal verbs or modern words (slang). At the same time you can improve your speaking, listening skills. Also, that will help you to communicate with people from different countries. I would like to go to the USA, because I think that American English is much easier than British English. I think so because there's a huge difference in pronunciation and writing. But it doesn't matter wich country you are going to visit, because if you want to make your English better, you have to practise your speaking skills as long as you can. And I think the easiest way to do it is to go to the english-speaking country.