This isn't at all what I set out to do. This was originally one of the large ocean cities at 1,200 distance from the core. It was so similarly shaped to the core, it gave me the idea to complete it's shape into the actual core. I wanted this to be a realistic representation, I just couldn't get the colors to mix and match up with the actual core. Needless to say, this ended up being a much larger project than I expected, swapping out the entire floor of the city. I mapped out all the pixels and this is exactly 3x the size in tiles.
Anyway, what I ended up with is more like a challenge arena. I just need to map out the grate bridges into a maze-like path that will lead you to the broken core near the middle.