Why are all of these cities in a straight line?

Guess which country I'm from based on which US states I've been to.

Now with a full-blown technicolor map of where I live in the photo!

Guess what country I’m from based on the colors

Outshitted, by the real world

Voyager took over a year to get to Jupiter, Florida

Is there s lore reason why all the major cities are on this line? Why can't they manifest destiny? Aren't there rivers in the west?

I know this is a stupid question so you don't need to insult me but is there a name for this region?

why are these two cities in a curved line?

Why does Macedonia have so few islands compared to its neighbors?

Guess where i am from based on the states i have been to

Why