The back 9 at Bradford Country Club in Haverhill, MA. It's been discussed here several times, never politely.
I played there a bunch with a friend who lived down the street. We always ended up playing #18 in the twilight, and I have never successfully carded a score for the hole. Despite playing more than a dozen times, I was never able to find my tee shot, despite trying clubs from a driver down to a 5-iron.
Not to mention #12...
Edit: I guess they swapped the nines, and #18 is now #9:
Edit: I guess they just randomly shuffled the holes, because #12 is still #12. This picture leaves the huge elevation change as an exercise to the reader, but I believe that the scale of the landing areas B and C is correct: