The center region of Argentina, is called the Flatness. In all these territories it will be hard to find even hills, except for some rare spots.
Also, in this region, there are the most important 3 cities in the country: Buenos Aires, Rosario and Córdoba.
The center region is probably the one that attracts the least ammount of foreign
tourists, but this doesn't mean there's nothing to see.
The majority of the Argentinian population inhabits this area, giving it an incredible display of different architecture styles and filling each place with loads of interesting, when not misterious, stories.
Here, to your left, you have some more detailed information of some of the spots worth a little visit.