The diversity of Andes is so big that it's hard to enjoy all of it in one single trip.
What we'd like to do there is to visit the native indians´ (mapuches and incas) ruins almost as old and intriguing as Macchu Pichu in Peru. And then a stopover in Atacama to see the bubbling sizzling geysers generated from underground volcanos that helped form the Andes.