A picture of my great-grandfather.

I loved this photo since I was a child. Does anyone have the opportunity to find out where this picture of my great-grandfather was taken? The only information I have is that he worked at customs in Germany and bred horses.

Unfortunately, my grandma has been dead for a long time and I never had contact with my grandpa. I have so many positive memories of my great-grandparents and would love to know where this photo was taken.