This is one of the gates (I believe it is called the Colmar gate) that leads to the medieval walled city of Neuf-Brisach in Alsace:
And if you look closely enough on the wall underneath the ladder, you’ll find a pretty rare sight in Europe, a mantis that I caught hanging upside down on (but to be honest, mantises that hang rightside up are just as rare!)
This is a protected species in Germany. I am not sure what would happen in France if you bothered this little fellow. But if you found him in Germany (just about 5 km away is the border) you’d be violating a rather serious law to protect endangered wildlife, and the police would not hesitate to arrest you.