Ok, so you all know about the Infernal City novel? If you don't, it's basically a city on an island floating in the sky. Now correct me if I'm wrong, but in Skyrim, Ysolda mentions that the Sleeping Tree must have come from a rock that landed in Skyrim from Vvardenfell. Although, she also mentions that a traveller mentions that a seed or whatever fell from an island floating in the sky, but Ysolda dismissed it as nonsense. Does any think that this could be the Infernal City?