Buenos Aires
I have traveled to quite a number of different places including Egypt, England, Belgium and Finland. But one place I have never been fortunate to travel to is South America. I have friends who have been to various countries and they recommend Buenos Aires as one of the top places to visit.
The architecture there is remarkable! I know this might sound morbid, but I would really love to go see the Recoleta Cemetery. It is varying architectural styles and is the burial place of Eva Peron (Evita). 
If you want to read more about Buenos Aires from someone who is actually living there, then you should be sure and read Buenos Aires Travel Guide Blog. The blog is full of helpful insights and out of the way places that an average tourist may not know about.