How can you possibly tell that you're actually in the Rio de la Plata area? Oh, you had a steak for breakfast and afterwards you were dancing tango? You're kidding me, right? That's fine but this is not what I was up to. It's the yerba mate that makes the point. Drinking the traditional brew of leaves from the yerba mate plant is a good indicator for telling that you are probably either in Buenos Aires, Montevideo or in between. Mate as it shortly called, is the quasi-national drink of Argentina and adjoining countries.
Have you ever had yerba mate?