Where are you coming from? It
Where are you coming from? It depends what country you from and whether you are willing to travel all around GerMany.
I personally like big cities such as Berlin or Hamburg. They are very international and offer many attraction and sightseeing. Berlin has many historical places, still a part of Berlin Wall and check points between the former East and West Germany. There are also many bars, museums, shopping places and so on.
Hamburg is very beautiful. If you like a city with a harbour then that is certainly the good place to go. Other big cities such as Frankfurt or Stuttgart offer many things too.
If you like countryside than I would go to places close to Austria or Switzerland. Black Forest is also one the top places to go.