The Semmering Railway and Mystery Mountain, Austria (181/418)

The Semmering Railway, built over 41 km of high mountains between 1848 and 1854, is one of the greatest feats of civil engineering of this pioneering phase of railway building. The quality of its tunnels, viaducts and other works have ensured the continuous use of the line up to the present day. It runs past a background of a spectacular mountain landscape containing many fine recreational buildings resulting from the opening up of the area with the advent of the railway.