Kertesz is one of the greatest. (IMHO). His images always seem to be a bit lyrical and while often very simple on the surface the compositions and framing of the scene are pretty complex. Most of his best work always seems to contain a human element or the feeling tha someone is present, just outside of the frame of the image.
In this image I always liked how there is a line of trees that make a nice diagonal across the image with that diagonal being supported by the gracefully curving fence at the bottom and the lighter curving path above that line of trees.
It very much keeps in step with modern ideas of painting at the time, flattening the scene, eliminating the impression of depth and distance.
The two people walking seperate paths, maybe oblivious to each other adds the final touch.
Nothing really deeper to it then a beautifully recognized composition of toanlity and form.