Quote Originally Posted by bartuccio3
My theory on this subject is that the Zanarkand Tidus and Jecht are from is an aeon as many before me have pointed out, everyone inside being an aeon. What I think though, is that this Zanarkand aeon is located right next to its fayths, the reason is that nobody from Spira ever noticed this and that there is a mysterious tornado of water near the cluster of fayth used for Zanarkand and its inhabitants. The tornado could be concealing a microworld, that sin and Yu Yevon could shrink down and enter, but nobody else from spira could, and that people from the Zanarkand aeon could go far enough out to sea that they'd cross into spira but losing energy from the transition between the worlds could knock you out long enough to get lost in the seas of Spira.
There's really nothing to suggest that, though It's far more simple just to conclude that it's an Aeon manifested the same as all other Aeons and that it lies out at sea somewhere.

As for the torrent of energy on Mt. Gagazet, that's just the flow of memory from the Fayth that is used to manifest the city.