The most difficult, penal bunker on my course is exactly like this one....the fairway is somewhat humpback, so your second shot is downhill to the green, though the green is tilted back to front, unlike the example here, but the bunker is still completley hidden from view in the fairway. However, the bunker serves a dual purpose to penalize someone attacking a back pin placement and going long and to stop balls from bounding down the slope behind the green into a road about 50 yards behind the green.
Luckily I've never been in that bunker, but I think it makes back pin positions, which are normally easier for most golfers to attack, more nerve-wracking on this particular green, as everyone is scared that if they catch it just a little better than they expected, the result could be disasterous.