Bad Vöslau is a spa town and municipality in the state of Lower Austria. It is also known as the cradle of the Austrian red wine cultivation. The population, as of 2022, is 12,424.

The Southern Railway is a railway in Austria that runs from Vienna to Graz and the border with Slovenia at Spielfeld via Semmering and Bruck an der Mur. Along with the Spielfeld-Straß–Trieste railway, it forms part of the Austrian Southern Railway that connected Vienna with Trieste, the main seaport of the Austro-Hungarian Monarchy, via Ljubljana. A main obstacle in its construction was getting over the Semmering Pass over the Northern Limestone Alps. The twin-track, electrified section that runs through the current territory of Austria is owned and operated by Austrian Federal Railways (ÖBB) and is one of the major lines in the country.