Taiki is happy to have Tidus sit next to him as he shaded parts of the map, adding to it idly as he spoke.

"Yes... The imperial palaces, and other important palaces... They are all on top of mountains so large that they go above the sea of clouds. That's where those who are immortal, like the king, live. If you are in the imprial palace it is like being on an island in an ocean, but really it is on top of a mountain and from below what you are seeing as an ocean is the sky."

It might sound strange, but then again Tidus' world was strange too, it had buildings built on water, or under water...