The Hohenzollernbrücke in Cologne is so full of love locks that graffiti painters are using them as a canvas, which I find a great creative use for them.
I couldn't find a picture of the graffiti itself, it might be only visible from the trains running on the other side. Here's a photo of the locks: https://www.ksta.de/image/39079132/max/600/450/8a9b8aaf6594d...
