here's a nice little quiz from a german online newspaper where you have to guess (or know) the city where the interchange shown in the picture is located:
http://quiz.sueddeutsche.de/quiz/0e8abb1efe7458d1a7ac0a00396225f3-autobahn-quiz/abort?number=1 (http://quiz.sueddeutsche.de/quiz/0e8abb1efe7458d1a7ac0a00396225f3-autobahn-quiz/abort?number=1)
- The text is in german, but you really just have see the picture and click on the given names of the city.
- it takes max 2 minutes
- I hope the link works correctly
- you maybe have to disable the adblocker for this site to funktion correctly but you can turn it on again afterwards
have fun ;)