Crimson Peak is an absolutely gorgeous movie. Sumptuous even, if you like big words. Do not be surprised if you see Guillermo del Toro’s gothic-romance-horror movie eventually nominated for some Costume and Production Design Oscars in a few months. But, as star Jessica Chastain (who completely steals the movie, by the way) told us, there’s actually more to Allerdale Hall, the haunted house at the center of the film, than you might even be aware. In fact, if you look closely, there are actually hidden, subliminal messages within the walls.

Guillermo del Toro’s team actually built Allerdale Hall as a real structure because he wanted the actors to be able to move around within it and have it feel like it was as much a part of the story as the characters themselves. It also helps give this movie a sense of space. The tracking shots aren’t showy like Gravity or Children of Men, but they only add to the atmosphere as the characters duck in and out of corridors and hallways.

In addition to creating the actual house, Chastain says that Guillermo also gave each of the actors a detailed biography on their character with lots of information that you’ll never actually see on the screen. What were the secrets of Chastain’s character? Well, we’ll let her explain.

Crimson Peak opens in theaters this Friday.