We drove as much as we could on the yellow roads to keep away from the traffic, some of the roads were quite patched and uneven.
We crossed Parana river which has the worlds biggest power producing hydro dam.
But where we crossed just a big big river, the seventh biggest by volume in the world. We saw a few more parks by the water but did not stop to see if they were paid entry.
Any open farm land has big wide terraces in them and we can only assume it is to stop/slow the runoff after their tropical downpours.
Found a camp on a side track beside more soya beans