Between Buenos Aires and Iguassu Falls that are situated on the border of Brazil and Argentina. We dealt twice with corrupt police, Mike got a flat-tyre so we unexpectedly spent the night in a massive grain processing factory during torrential rains.
These rains the following day turned one section of the road into a river. Oncoming cars would send a wave of water that lapped our knees. Mike said yes to picking up a Argentinian hitchhiker at a fuel stop. She got soaking wet and promptly got off in the next village.
I caught an oil spill at one stage doing 100km/h, fear shot through during the momentary loss of traction.