They said it could not be done! For 72 miles through 12 tunnels and over 17 viaducts, the railway line from Settle to Carlisle climbs over some of the most spectacular countryside in Britain. This famous track was one of the last important lines to be laid - it was opened to traffic in 1876. Simon and Goldie follow the tracks of the pioneers who created one of the engineering master-pieces of the Victorian age.