Translation of humanism in German

We drove to the hotel Rex where we made reservations in advance. However, once there, two American guys told us that they had a voucher from a travel agent and the price was like half of it.
In the end of the day we went to visit the Vietnam war museum. It is actually called the American war museum. It gives the Western visitors a different point of view of the events forty years ago.
The biggest city in Germany is Berlin. The other big cities are not as big but some of them are really nice. And especially the smaller cities here are very charming and worth visiting.