On an unrelated note, I will not stay in Cardiff, for all that it is convenient and has a castle of its own. The city is a bitch, and whereas with my handy A to Zed it may now be my bitch, it's still a bitch nonetheless.
Edit: Ooh, it's got working siege engines! (The castle, that is, not Cardiff. Not that I necessarily put working siege engines past Cardiff.)
Ah, and I suspect parts of the moat were used for bits of 1x13. Behold.