There is a turning triangle partly tunnelled into the mountain at Kleine Scheidegg at the summit of the 800mm gauge Wengernalpbahn in the Bernese Oberland, Switzerland. Kleine Scheidegg is reached from two lower termini, Lauterbrunnen and Grindelwald, located on opposite sides of the col. Trains normally descend in the direction they have arrived from and are designed accordingly with the power unit at the lower end and seating angled to compensate for the gradient. They therefore have to be turned at the summit should it be necessary to make a through journey. Whilst limitations of space dictated that the triangle had to be partly constructed in tunnels it also ensures that in winter it is snow-free and is readily available in emergencies.