The one I always think of because it is so hard to describe but playing alone, with hardly anyone on the course, at New South Wales.
I was walking and carrying my bag and on the fifth hole which plays over a hill with a long gentlish slope down to a green on the edge of the water I hit a driver into the middle of the fairway. I am told a good player should carry the hill but I was left with a blind second shot.
I hit a five iron, which at the time was about a 190 yard club. I thought the shot perfect, over the crest and down the hill in the middle of the fairway.
Of course, I never found the ball and the "unique experience" part of the shot was that I I searched for about twenty minutes .
There was wind, and very firm conditions and I could not fathom where the ball could have stopped so my search entailed areas up the hill in the rough that must have been two hundred yards from the green, as well as green side bunkers, the rocks and water beyond the green and a glance in the hole as I walked by.
How neat that the ball could be anywhere?
Adding an architectural element, perhaps this experience was what initially turned me off from the parkland courses in my area, incuding my own which seem to prize high velcro rough.
I do think it also turns me off a little from all the modern courses that wind through sand both sides that effectively serves as the dreaded "saving bunker".