If you are interested in Europe in general, you may want to check out Adriatic Tours. They ride through Slovenia, Croatia and Montenegro, among other places. I am from former Yugoslavia, where these current states are located, and it is absolutely breathtaking! You won't be sorry riding there, views are amazing and people are very friendly. Just look up Dubrovnik, Croatia, as well as Dalmacia in Croatia and you would want to be there right now. Rider magazine used Adriatic Tours and had an overwhelmingly positive article about it. Btw, most people there speak English.