This picture shows the border between Austria and Germany going right through a village. On the very left side you can read the name on a sign “Grenzkontrollstelle Grossgmain” (so the picture was taken from the Austrian side). In the middle of the picture you can see a signpost with the emblem of Bavaria (the Bavarian part of the village is called “Bayerisch Gmain“). Both border stations are in use and you had to show your id card to each station if you wanted to cross the border.
That all went away when Europe finally got their act together and abolished (some) borders. Today you can freely walk between the two parts of the village without having to show any documentation.