Planning trip to Brazil/Argentina in December
I'm planning a 2 week trip in late december to Brazil and Argentina. I'm considering rio de janeiro for 5 days followed by iguazu falls 2 days. I would then fly into AEP and visit Buenos Aires for 5 days. Lastly I'd fly to Mendoza for 2days and fly back to ATL from SCL.
I'm wondering if my itinerary is doable or if I might have overlooked something. Is there a city I should spend fewer/more days in?