i've never heard about the congress-bundestag, but sounds like a big chance! is it an exchange for school students or university? and is the winner free to choose the city and university were he wants to study? if so, berlinberlinberlinberlin HAHA
how is germany, i don't know. could be i'm a cocky berliner, but i like berlin the most and therefore i can't really tell you a lot about other cities. to me they're all lame and countryish, but i just don't know it better.

but we have some beautiful cities in germany, like bamberg, i went there once. the historic district is stunning and everywhere just students. there are other university cities like that, but mostly in south germany i think.
for me it's hard to say what is typical german or german culture (i think this is a nationwide problem, except for the bavarians

)
but berlin is multicultural, very diversified people and culture, every district is so different. i don't know. haha
GOOD LUCK