The environments are actually the most important part of "The Journey", as the virtual locations are assigned to real places of your environment. You have to walk yourself to get from one place to another.
While you play the game, more and more areas will be known to both you and the game. However, that's not all. In "The Journey", you can also reach other areas by - in the easiest case - opening a virtual door. This allows scenarios which are much more complex and interesting, than it would have been possible otherwise!
When playing the game, don't forget: the game remembers all areas where you have already been to! So don't play the game in a train when it might take some weeks until you pass the same spot again. There is no cheating, you really have to walk yourself...
Try the game!