Fantasy/Historic Spawn

Just a little spawn area I've been working on.
The idea came from a kind of colloseum build, mixed with a little bit of fantasy. I quite like how the build has turned out.
The idea was to have it half submerged under a mountain, with some buildings surrounding it and the whole lot on a floating island.
I'm going to have to rethink that though, because the slabs make the stone look weird when I placed it in a mountain.
If you've got some ideas of details I could add - especially to the outside walls - let me know! :3
*I won't be uploading this file unless I'm sure I won't need it*