When I was working in Italy, near Milan, I discovered the joy of driving round roundabouts the ‘wrong-way’ (anti-clockwise) on the ‘wrong’ (i.e. right) side of the road, and where vehicles joining the roundabout have priority over vehicles already on it - everything the opposite way to UK roundabouts.

After about six weeks I’d just about got used to it. Piece of piss from then on! ;-)