There really is no best city that suits everyone; it really depends on your interests. However, in my experience, it would be wrong no matter where you choose to go. Copenhagen and Amsterdam are wonderful, but so are Prague, Berlin, Stockholm, Rome, Florence, Venice, Budapest, Vienna, Barcelona, Geneva, Zurich, Paris, Bruges, Munich ... I've been to all of them and more and would be glad to go back to any of them.
In your case, Amsterdam is close and involves relatively little travel time. There are hundreds of museums covering about every conceivable topic, historic sites like the Anne Frank House, canal trips, festivals depending on exactly when you go, and lots of restaurants and shopping.
I would suggest Paris and London would be pretty good cities to go. There isn't really a best city to go to. I think it depends on the tourists and what their opinion of the city.
It depends on what they like. In my opinion, Paris is a really good city especially if you're a couple. They have really nice things there :).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.