Abandoned

My parents stumbled upon this in the middle of the forest when they went on a morning walk while we were up camping and showed me where it was. It's pretty odd that it would be there considering how high up on the mountain and how far from town we were. Not to mention that because of the way the trees were, it didn't look like there was any way for it to have gotten where it was. I guess the trees sort of grew around it, but it still looked weird.