Goodnight Mommy
This film pits children against adults in an uncharacteristic way that you might not understand at first. Twin boys and their bandaged mother grapple with reality while attempting to readjust to their lives after a tragic accident. This one has gotten lots of criticism and acclaim alike.
Salò
In one of the darker films on this list, Salò follows a group of cultist that capture and tortures teenagers. They display horrendous acts of sexual humiliation, torture, and degradation, some of which were so terrible that they got this movie banned in several different countries.