I'd say Munich and the larger area around.
In Munich there is the German Museum, that shows the History of german science, and features a completely new concept:
Visitors can watch schientists doing actual fundamental research.
And in Bavaria in general, there are a lot of classic buildings that show german history, and you can close the days by sitting in the Chinese Garden in Munich and have a Mass of Beer and a Schweinshaxe.
Take my advice: They NEVER fill up those Masskruge to the 1-Litre-Line - don't argue with the locals about that. They get REALLY pissed by such behaviour :rofl:
Okay, my question: If you could make the two of us into superheroes, not one of us, only both - what would you be and what would I be?