"Friend Mbo, the world is a most strange and wondrous place. The Iron Hills I speak of are the domain of the Wolf-folk, in the fair land of Naverone. I speculate that the ley-lines whereon this glorious castle is built have caused worlds to merge, hence the confusion. Friend MMario makes reference to Velgarth, a world once torn by wizard wars."

And (stepping out of character for a moment): If you'd wish to know more of Velgarth, read "Magic's Pawn", "Magic's Promise", and "Magic's Price" by Mercedes Lackey. As for Naverone, it exists in my imagination only, though you may see a glimpse of it here.