The Wengernalp railway (WAB) is one of the oldest mountain railways in the Bernese Oberland – already in 1890 the authorities granted the concession for the construction. Three years later, the narrow gauge cogwheel train that runs to the Kleine Scheidegg, opened. The old track between Lauterbrunnen and Wengen had an inclination of 250 parts per thousand (25%) and was exposed to falling stones and ice. Therefore a longer and flatter line was built already in 1910. The old track was dismantled and partly re-naturalized in 2008 and 2009. The Wengernalp railway is with its length of 19.1 km, the world’s longest continuous cogwheel railway. In addition to transporting visitors the train also serves for the supply of goods of the Wengen resort. The construction of mountain railways was part of the "conquest" of the Alps, which started in the 19th century: At that time the Alps were almost "furnished" with large hotel buildings and the high mountains were made accessible with trains to a wide public. The lifts were and are still crucial for the tourism development of the region.