Isn't there a pretty wee one front right of the green on the 9th at TPC? Plus, of course, there's that one on the 17th island. I believe I recall one really, really miniscule one in front of a green on one of Mark's splendid photo tours, say 2-3 months ago. Can't recall which course, Florida way I think. The bunker was so small it was zit like.
ATB