Go ahead and call me crazy but I believe that a significant argument could be made for the existence of Hogwarts and the wizarding world. I have been to London Station and I have seen the wall between platform 9 and 10. It does exist and i've seen it. And when i went up to touch the wall i started to not be able to feel my hand. It was not a numbness i had ever felt, it was....something....more...But also I have hiked those mountain ranges and I have seen things that will blow your mind. I have seen what i believe to be unicorn horns lying on the ground from the maturing stallions that shed there unsharpened horn for new ones. I have heard giants walk and breathe and I have smelled the smoldering flames left by great dragons.