The Grenzland-Weinstraße in <a href="//commons.wikimedia.org/wiki/Ehrenhausen_an_der_Weinstra%C3%9Fe" class="mw-redirect" title="Ehrenhausen an der Weinstraße">Ehrenhausen an der Weinstraße</a>. At some sections the road itself constitute the border between Austria and Slovenia (in this image it is marked with white dots on the street surface).
<a href="//commons.wikimedia.org/wiki/User:Gugganij" title="User:Gugganij">Gugganij</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>