View of the Trisanna Bridge

Trisanna Bridge (popularly also Wiesberg(er) Bridge)
It was built at a height of 86 m with a span of 120 m in 1884 (construction began in 1883) as part of the construction of the Arlberg railway. Electric lighting was even installed for the bridge. This was a sensation at the time. It was completed within a year and was for a long time considered the largest structure of its kind in Austria and a monument to Austrian engineering. In 1924 the structure was reinforced and in 1964 the supporting structure was replaced by a new steel structure.
On June 26, 1933, bombs were found in front of the district headquarters in Kufstein. On July 4, 1933, a catastrophe of enormous proportions could only be averted through luck, because of two explosive bombs planted on the Trisanna Bridge on the Arlberg Railway, only the smaller one exploded. The main perpetrators are identified as the Innsbruck city councilor Hans Glück and the Nazi traveling speaker Gottfried Zötsch. As a result, home guards were deployed to guard the bridge on July 10th.
Source: Walser, Harald The illegal NSDAP in Tyrol and Vorarlberg, Europaverlag, Vienna 1983, p. 80
Text / Source: Austria Forum
austria-forum.org/af/Heimatlexikon/Trisannabr%C3%BCcke

In the distance you can see the old railway bridge over which trains still roll today