This Age of Steam Expansion #3 contains a two-sided board with Scandinavia and Korea.
The Scandinavia map adds sea routes and an extra action "Ferry" which allows transport from one coastal city to another.
In Korea, none of the cities are colored, i.e. none have an inherent demand. The demand exists for the goods of the color of the cubes it contains. Once a city no longer has cubes of a color, its demand is gone.