Upcoming South American Travel

[TheEngineer]

I'll soon be heading down to the following areas:

Peru: Cuscon, Sacred Valley, Machu Picchu
Argentina: Buenos Aires, Iguazu Falls
Brazil: Rio de Janeiro.

Any places where it is definitely a not to miss? Any restaurant, show or wine suggestions? I won't have a chance to go to the Mendoza area this time though which is too bad,....