They're at NGLA, The Creek and many old courses.
A green that tilts back to front, with a back upper tier, with a sheer drop off, with a vast bunker behind the green.
Hole locations on the upper tier challenge the golfer, exponentially.
Shots hit short of the upper tier are faced with a difficult two putt.
Shots hit over the green are faced with a near impossible recovery to a smaller tier on a green that slopes away from the golfer.
Knowing that disaster waits, behind the green, makes good golfers timid, erring on the conservative side, resulting in careless bogies.
Even recovery shots from in front of the green are difficult,
It seems that the "classic" or "Golden Age" architects used this technique, this feature, in great abundance, yet, its effect on playability is undeniable.
Even if it is used repetitively, it seems to work marvelously, since, sooner or later, a golfer will come up short or overshoot his mark, resulting in a bogey or worse.
Why don't we see more of this feature in modern designs, especially since earthmoving is so widely employed ?
# 16 at The Creek is a perfect example, amongst many.