Mendoza's the place to be!

This IFSA-Butler program is one of the few that allows you to study in Mendoza, a great city near the border of Chile (easy to travel back and forth to see both places). The support staff is the best part about this program, they meet you at orientation, are so much fun and then when you're in Mendoza, they'll always be there for you.
There's plenty of trips and excursions (within Mendoza) and plenty of nightlife.
You have to get used to traveling 'safe', there's some problems with theft like in any big city with a lot of tourists and walking a lot because there's public transport but it's usually easier to get around on foot.
There's also a lot of opportunities to teach english while you're learning spanish, which is a good way to meet local people who want language exchanges, etc.
Great place to go!!