This bridge designed by Otto Wagner was built in 1894/1895 and is still in use by the subway line U6 which is obviously an elevated railway at this part of the line. There are several names for this bridge, e.g. Otto-Wagner-Brücke, Wientalbrücke or Brücke über die Zeile.
Pic of my train taken while sitting in the last coach. The train is just passing the famous Landwasser Viaduct of the Albula Railway, a world heritage site in Switzerland. In this huge scenery my train looks like a tiny object of a model railway layout, doesn’t it?
The frame pillar viaduct (Trestle) of Markersbach (Markersbacher Viadukt) was built in the years 1887-1889 as part of the railway line Annaberg-Buchholz-Schwarzenberg for bridging a side valley of the Great Mittweida. Today the railway line (Erzgebirgische Aussichtsbahn) is in operation for special trips only. [German]
The Murinsel in Graz is an artificial floating platform in the middle of the Mur river. US artist Vito Acconci designed this sort of island in 2003. Two footbridges connect the platform with both banks of the river. Inside the dome, people in a café have a good time watching canoeists driving along the river. [German]
In Austria there are only three steel trestles. One of them is this viaduct of the Stubai Valley Railway (Stubaitalbahn), a railway which connects Innsbruck with Fulpmes in Tyrol. This pic was taken from inside the train. [German]