I don't know about Ferelden, but you're not the first person I've seen ask about Denerim. 'Can't say I know where that is, but at least it seems you might not be alone.
This place is Earth- also known as the mortal word, the other side, depends on where you're from. Everyone seems to believe you were brought here via tornado, or some other wind-based weather phenomenon. The jury's still out, though. I'm working on it.
Harry Dresden, exceedingly bored wizard investigator waiting on an appointment to wander in- to answer the obvious questions, at least.