That's pretty rad.
It helped me visualise something I've always wondered about. If you get a train to Manchester from down south it'll go via Sheffield. Once it's stopped at Sheffield, the train will pull out the station going back the way it came. This is quite disconcerting the first time it happens to you, when every other train you've ever been on has always kept on going the same direction. Now I can see what's going on.
The Hope Valley Line between Sheffield and Manchester is beautiful though. It goes right through the Peak District national park.