Good destinations for improve improving ("Good destinations to improve your Spanish" sounds more native-like though) your spanish. (Part 2)

In my last entry I have wrote about good destinations for improving your spanish.
I wrote about Mexico, I think it is one of the two best destinations. Another great destination is Argentina.
In Argentina you will not only find good beaches, coconut and palm trees instead you will find many heterogenous (What do you mean by "heterogenous?" I think  you meant "unique", right?)places. From jungles with big and exotic falls to mountains, lakes and ski slopes. Large and cosmopolitan cities with a beatiful culture and tradition.
The country is mostly safe except around large cities (Buenos Aires, Rosario and Cordoba)
Routes and highways are good enough, the train network is bad or nonexistent and the country is not too expensive.

I hope this helps...

I would go to Argentina but I don't know anybody there and it's a pretty long flight from the Northern part of the US. :(