- The opening credits music composed by Maurice Jarre, an eerie, fairground-like waltz that's truly hair-raising.
- The surgery scenes.
- You'll never see accommodating middle-aged women (or Alida Valli, for that matter) the same way ever again...
- Christiane's mask, while extremely well-made and pretty, is quite creepy.
- And most definitely Christiane's horribly scarred face which frightens herself more than anything.
- The ending, where Louise gets stabbed in the neck with a scalpel, Dr. Génessier has his face ripped off by his own maddened dogs, and Christiane wanders off into the night, free but likely quite mad. The music only enhances the mood of the scene — beautiful yet immensely unsettling.