Of all the fundamental psychological demands placed on a visual environment, Lam ranks the need for clear orientation as paramount. Orientation can be initially understood in spatial terms here. In which case, it would then relate to how discernable destinations and routes are and to the spatial location of entrances, exits and other specific facilities within the environment, e.g. a reception desk or the individual areas of a department store. But orientation also concerns information on further aspects of the surroundings, such as the time of day, the weather or what is going on in that area. If this information is missing, as may be the case in closed spaces in department stores or in the corridors of large buildings, then the environment is perceived as unnatural and even oppressive. It is only by leaving the building that we can catch up with the information deficit.