Lets just say you wated to add in some odd race such as trolls or ogres. Is it even possible to have them roam about and be unknown to people? Is it even possible to have wizards and still keep magic unknown? Better yet could it be done in some place such as Dallas or L.A.? I know if you have creatures leak in to this world then it is possible to have creatures in the modern world but is it possible to keep dragons and everything in the modern world and still unknown to people IF they were always there to begin with. I just don't see how such a story is possible unless you make all the creatures practically endangered or create some alternate plane of existence that they roam in, which I don't care for either. So my simple question is can magic and magical creatures always exist in the world and still be unknown to everyone?