Jungfrau Railway
The Jungfrau Railway (German: Jungfraubahn, JB) is a metre gauge (3 ft 3 3⁄8 in gauge) rack railway which runs 9 kilometres (5.6 mi) from Kleine Scheidegg to the highest railway station in Europe at Jungfraujoch (3,454 m (11,332 ft)), between the Bernese Highlands and the Valais in Switzerland. The railway runs almost entirely within the Jungfrau Tunnel, built into the Eiger and Mönch mountains and containing two stations in the middle of the tunnel, where passengers can disembark to observe the neighbouring mountains through windows built into the mountainside.