All of the most important rooms in the chocolate factory are underground, and therefore not visible to people above ground. Above ground and outside the gates of the factory, onlookers might assume that the factory comprises what they can see. In fact, they are wrong. Dahl uses this discrepancy as proof that things—especially in the factory—are not always what they seem, especially if people look beyond what is immediately in front of them or use a little imagination. Indeed, the ultimate prize at the end of the day is one beyond anyone’s wildest dreams.