Are these the remains of Castle Town from Ocarina of Time hidden within the Great Plateau in Breath of the Wild? Since the Temple of Time is here too, and this game is most likely set after Ocarina of Time, it should stand to reason that no matter which of the three timelines we’re in, Castle Town should exist in some form or another.
A video by theorist Zeltik expands on growing evidence to support this case.
The remains were originally pointed out in a post by Reddit user TeekayJames, supported by map comparison from NiteMary which shows how the Castle Town map landmarks overlay onto the Great Plateau.
As the old man found in Breath of the Wild reveals, “This is the Great Plateau. According to legend, this is the birthplace of the entire kingdom of Hyrule.”
It’s definitely interesting to see how the map lines up with maps from previous games.