The construction of the railways in the mid-19th century made the Lake District, and Keswick in particular, more accessible to visitors of modest means. The original impetus for building the Cockermouth, Keswick and Penrith Railway (CKP) line came from heavy industry: the new Bessemer process of steelmaking brought a great demand for the rich iron ore from west Cumberland and the coking coal from Durham on the east side of the country.