Many companies are so focused on getting the job done that they never really take the time to invest in the place where that actually happens.
Many offices make use of cubicles and partitions, for example, which can isolate employees and put a damper on communication. Rearranging your office to make it more "open" in design will help open up the floodgates for communication and collaboration, not to mention make the space more enjoyable to work in.