For a real adventure try a “B” road barely wide enough for one small car with oncoming Land Rovers, Bentleys and the occasional lorry at 60 MPH.
Did that.
Also navigated eight-spoke roundabouts and small villages with cars parked on both sides of the “street.”
...all this while driving on the left side of the road from the right side of the car.
White knuckles all the way.