Famous for being one of the most scenic rail routes in the world, The West Highland Line train goes over the Glenfinnian Viaduct, famous for starring in the Harry Potter films. Over the 5 hour journey to Mallaig, it travels through barren heather moors and dense forests, and alongside steep-sided lochs, snow-capped mountains and waterfalls, leaving passengers transfixed by the breathtaking wilderness outside their window.