A film becomes haunting when it becomes a poignant and evocative experience. An experience that, just like a trauma, which in ancient Greek could be translated as "wound," stays in your mind and heart as an unforgettable memory. This memory, as if it was a ghost, visits you and can make you feel agitated or concerned, but without even let you know its true nature. Nonetheless, it lingers and it's always there waiting for you.
The films that are included in this list try to reflect this feeling, at times through the suggestive look at teen years, at other times revealing the true nature of disturbing topics, but always displaying movies that will stay with you long after the credits roll. There are some spoilers, but they're not so gruesome.