What's the deal with this place? Is it "stuck" in the middle of a valley, or unearthed from the ground? I used to think it was completely underground but you can see the sun and moon from it, so that blew my theory.
Also, any explanation of why it's still intact or why Diabolos and the epitome of demonkind live deep inside it? (hyperbole on my part, but it seems odd - abandoned city on the outside, and weird, demon-like creatures on the inside).
Just wondering - Thanks!