Where to study abroad?

I have plans to study my 3rd or 4th year abroad and want to experience an interesting and different culture but also have use for it in my career.

I guess the obvious choice would be China, learn the culture and perhaps at least to speak the language(writing takes forever I suppose).

What other interesting places? Brazil is a growing economy with a nice culture and have some good universities.

What else? Anyone been in China, especially Shanghai?