The visual elements that enhance the horror aspect of a series include dark lighting, an eerie setting, creepy costumes, and disturbing special effects. These elements create a spooky atmosphere and contribute to a sense of fear and tension for the viewers. Additionally, auditory elements such as suspenseful music, chilling sound effects, eerie silence, and sudden loud noises can further intensify the horror experience and immerse the audience in the unsettling atmosphere of the series. Together, these visual and auditory elements work in harmony to enhance the horror aspect of the series and create a truly terrifying viewing experience.