This tour looks absolutely amazing - apart from obvious highlights such as Machu Picchu and Lake Titicaca, have a look at some of the other sights on this incredible sounding tour:

https://www.google.ie/search?q=salinas+grandes+argentina&biw=1366&bih=618&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjdpr20iLXPAhXHIsAKHQgeB78Q_AUIBigB#tbm=isch&q=salta+argentina 

https://www.google.ie/search?q=seven+colours+hill+argentina&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj27tnEh7XPAhWsK8AKHZ8FDpMQ_AUICCgB&biw=1366&bih=618 

https://www.google.ie/search?q=salinas+grandes+argentina&biw=1366&bih=618&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjdpr20iLXPAhXHIsAKHQgeB78Q_AUIBigB 

Here's hoping this tour is a success as this looks like a once in a lifetime experience to visit some unique and stunning sights.  I visited Buenos Aires and Rio four years ago, but would be very happy to see them again.  South America is an incredible continent and if you're looking for a truly amazing experience, I really recommend it.  You can always sell a kidney to fund it!!

Cheers,

Bob