Old stone corrals, Cerro Chato, Florida department.

Well, but the neighbouring Brazilian South has a 48 people/km² (27.4 million people); Buenos Aires province+Federal Capital, 60 people/km² (18.5 million people). The guy has a point.Well if you look at population density is in the region, including Brazil, Argentina and Paraguay, all countries by around 20 Inhabitants per km2, like the average South America.