Tourists walk past a train of the Jungfraubahn railways at the Kleine Scheidegg station (altitude 2061 metres/6762 feet) near the Swiss mountain resort of Grindelwald July 25, 2012. The Jungfraubahn cog railway line, considered pioneering for the steep incline of its 7 km tunnel dug behind the Eiger mountain's North Face, is celebrating its hundredth anniversary on August 1. In the background is the north face of Eiger mountain (left, altitude 3970 metres/ 13025 feet) and Moench mountain (right, altitude 4099 metres/13448 feet). Picture taken July 25, 2012. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: TRANSPORT TRAVEL)