Rob Bell visits Wales to examine the story of a lost line between Ruabon and Barmouth. The route represented a sea-change in how ordinary Victorian working families were granted affordable access to the landscape and language of the Welsh heartlands. He takes a trip across the Pontcysyllte Aqueduct - the oldest and longest navigable aqueduct in Great Britain and the highest in the world - and goes canoeing in Lake Bala. In Dolgellau, Rob meets a local harpist and hears the sounds that became intrinsically tied to the image of Wales.

This lost line once transformed the fortunes of seaside towns, but it was expensive and difficult to maintain, and the boggy Somerset Levels presented a challenge to laying tracks.

This is the story of a freight line, built to traverse the tricky landscape of the Lake District to transport minerals from the many Cumberland mines, but which later was embraced by tourists eager to explore the spectacular countryside. Rob begins his journey in Penrith Station, where he?s advised that the lost line begins over the busy motorway between a fence and a walking track - not an easy route to find.

Rob's journey through Dartmoor from Plymouth to Exeter begins in unlikely surrounds: in the garage of model railway enthusiast Bruce Hunt. Bruce has meticulously recreated the beginning of this line in miniature, including a model of Rob himself, and explains how to trace the now lost line through the dense overgrowth which has emerged since its closure.

Rob starts his journey in the famous steel town of Sheffield, where he'll be following the old Woodhead Line, through the Pennines, to the industrial powerhouse of Manchester. This film is about human endeavour against all the odds, building, and running a railway through one of the most inhospitable parts of the country.

In Scotland, Rob follows the Elgin to Portsoy line, a line that once served the fishing and whisky industries. Local ramblers help him unearth a stunning view of the Spey Bridge, then, after trying a warming tipple of the hard stuff, he watches a boat race in Portsoy.