I will buy a Global pass with my bfriend (5 days traveling within 10 days). We will start from Spain, Barcelona. It is so much complicated than we thought. All days we are discussing about the cities we must visit. In fact there is just one city we are sure about, namely Amsterdam. What are your recommendations about must see cities and the route? Because we have just 5 travel days, we have to plan it very good. We are waiting for your commends. Thank you !!