There are very cheap flights within Europe. For example a flight from Frankfurt, Germany to Rome, Italy can cost you like 50€ if you buy the ticket at the right time. Rome is a must visit city.
Not sure about your personal finances, but Switzerland is very, and I mean very, expensive. If you want to keep it cheap, visit eastern part of Europe. Prague is a wonderful city and it's cheap too!
Beer is great as well. Not to mention the beautiful women. But in 7 days I believe you can visit like 5 countries if you really try, but to be honest, I'd cut it to 3 and enjoy my time there.
Source: I'm a European ;).
You're staying in Germany, so stay in Germany. It's a big enough country in its own right. Having been to Germany several times, Gerald is absolutely right.
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.