No logic?If you canīt see the logic itīs because you are blind.I supplied the logic.
I challenge you to fit this shape on any other known map.Not even on 1000 different maps you will be able to fit it.

To Unknowns:
Thatīs not the thruth.It only says Laguna goes from FH to Esthar.

Deling allow them to travel to Esthar but no one would be crazy enough to cross the bridge since they could get smashed.People on Deling City travels using DC
station,people on Timber take the train on the correspondent station,etc...
Who said people ever crossed the crater?There were beaches on Trabia.People can go there using ships.
I donīt know whether your theories on Zero Genesis and railroad workers were sarcastic or game-based.If you are referring to Doomtrain I should say there were enough workers on Galbadia to fix the train.
I said the horizon bridge is too long requiring a low sea level.
If it was not an ancient civilization then what was it?Aliens?
My guess:Centra civilization.

To skyblade-Then do it.I take my effort so itīs fair to ask you to take also.
Donīt say to me the triangle on the middle would fit Bermudas Triangle,Ah,Ah,Ah.
X is not Dr.Odine.
I said on the other thread that the lines are holographic walls.
X performed the Lunar Cry first and then created the walls.
To assemblage-The centra shelter is the most ancient vehicle ever created,isnīt it?