So there is speculation going around Twitter that Kalos and Galar are connected in some way. Kalos went to war with an unknown region, and many think it was Galar and this game will be a continuation on the story of the war. Also, there are train tracks that go in directions that don’t make sense on Galar, like you can see the routes they travel, and the last stop looks to be in the snowy area.
England and France have a tunnel that connect to one another is real life, and there are some horizontal tracks in the middle western part of the area that lead from the industrial city into the brown mountainous area, and where it would exit from (and possibly connect to Couriway Town) is suspiciously covered by clouds.
Then there is also a set of tracks in the West that go toward the south, into the mountains, which could also connect to Couriway Town, with many speculating Kalos is in fact connected to Galar in the North East of Kalos. River matches up, as does the cliffs.
I wish I could outline what I’m talking about, but I’m on mobile, but I might post something later.