Taken into service in 1971: the Pfaffenberg-Zwenberg viaduct (Pfaffen-hill and Zwen-hill are the names of two mountains it connects) was the biggest concrete bridge of it's time. 377m long, over a 100m drop, double tracks. Built as the first part of the new path over the Tauernbahn south ramp to replace the single track line, which twisted alongside the hills allowing a max speed if 70km/h, while on the new line trains can reach 110/130km/h and there is no more need for stations from the bottom (Spittal-Milstattersee) to the summit (Mallnitz-Obervellach). Furthermore this shortened the line by 4kms with the use of two new tunnels. On the photo: Railjet 793 Klagenfurt-Salzburg-Vienna-Vienna Airport (Schwechat) is heading north, up the grade. The next stop is Mallnitz-Obervellach, a popular winter holiday resort in the middle of High Tauern National Park.