Charnaux Frères Ed. (Savioz Phot.) / Adolphe Braun 1870 (ca) The Pilatus railway, inside the Chriesiloch.
Stereoview Ader Nordmann Photographies Online, 25 May 2020, Lot: 15
The rails of the Pilatus Railway near Lucerne in Switzerland are among the steepest in the world (altitude of over 2132 metres). They were put into service in 1889 to discover the Swiss mountains.