"T England's loftiest hill country, skirting the base of Cross Fell, the highest point in the entire Pennine chain," explained outdoor writer Vivienne Crow, whose Eden Valley walking guidebook uses the line for several of its hikes. "Passengers don't just gaze out at distant scenery – they are immersed in it, with the railway forming part of the landscape. Even with modern technology, building a railway like this would be a massive undertaking, so it's hard to imagine the skill, effort and ingenuity that must've gone into it in the 19th Century."