However, perhaps the most famous example of a hidden passageway is what modern architects call a "murphy door," most often portrayed as those secret doors behind a bookcase. Secret doors appear in ...

Are you tired of staring at that boring old closet door that doesn't quite fit in with your chic home decor? What if we told ...

Though the cool factor is definitely what appeals to me, Murphy Door also makes an excellent point about bookcase doors like this one: They turn a seemingly unusable space into ample storage.