[A magic intersection... in rocks. With holes in them.

...Right.]

Is that too obvious an answer? Or I guess it would be, considering the central point's meant to hold everything together. There's no reason why they wouldn't build a city around the strongest point. [He crosses his arms, brows furrowing.] Insomnia was the same way- the Citadel with the Crystal in the center, and the wall stretched out on all sides from there.