To me it looks more like Truman Show than Dream Zanarkand.Why do you think the opposite?Because an area is glued to another like the dream is a continuation of the earlier one,is that it?

The Pandora and the Crystal Pillar already existed 80 years ago.Sorceress Adel was born and the controlled Centra Soldiers were told by Adel how to construct the Lunatic Pandora.They made it then.I think the Crystal Pillar was made artificially using compressive methods in whch the minerals,mainly carbon composites evolved to crystal.Itīs shape was also masterminded.Later,Adel sends Esthar soldiers to excavate the Crystal and made people think it was from the moon.The Pandora was deconstructed just before Deling sends the spies and then constructed again.

Evidence:

Ulti to Seifer-"Find the LEGENDARY Lunatic Pandora said to be hidden benneath the ocean"

Itīs Legendary Pandora not Legendary Crystal Pillar.



Itīs impossible for a thing to became a legend just in 17 years.
A legend requires long time.

Definitive evidence:

Looking at the base (lower side) of the Pandora from the outside we see strange letters written on it.This was written by an ancient civilization.We know for instance that the writing of the Estharians is similar to ours.

Why do you say Adel canīt be more than 80 years old?

Look,the bridge is supported by pillars which means that itīs not too difficult to make it along with the wall.

About the straight walkways on the sides of the bridge:

Even though one can walk on the sideways of the bridge there is no brick wall to prevent people to fall on water.So itīs dangerous to walk on the sideways anyway.A train passing produce a side wind which can pull them out.