When Alice and Tom meet on the train they sit in an open space wagon of the so called "railjet", which is run by Austrian Railways (various shots include "Railjet" letters on seats, windows etc.). Later on we see them in a private compartment, which is taken from a a German train. The train that enters the station where Alice and Tom part, is an Austrian Railjet again. In reality these wagons are not mixed in one train.
When Alice and Tom meet on the train they sit in an open space wagon of the so called "Railjet", which is run by Austrian Railways (various shots include "Railjet" letters on seats, windows etc.). Later on they are seen in a private compartment, which is taken from a a German train. The train that enters the station where Alice and Tom part, is an Austrian Railjet again. In reality these wagons are not mixed in one train.
When Alice misses her train halfway through the movie, one can see a sign at the train station that reads "Düsseldorf". Alice then seems to explore the city, crosses a cemetery, climbs up dark narrow stairs and enjoys the view down onto roofs and a cathedral. This view, however, is not in Düsseldorf (Germany) but Salzburg (Austria) - more than 700km southeast.
After having met Tom, Alice exits the train in Linz, Austria (the train station sign is visible in the background), where she rents a car. Later on we see her looking down on a city and walking over a bridge, which is both Salzburg, Austria. Salzburg is located right at the German border with good train connections to Germany, so in reality Alice probably would have arrived by train directly in Salzburg, rather than taking this detour to Linz.