I would have cropped a bit more off the left side. The tiny bit of flowers and the rust color distract. I also don't like the border. That said, this is one of my favorite pictures in the contest. Good luck!
Precise application of the rule of thirds (place the objects of interest at the junction of lines dividing the frame into 3 equal parts) will give you a better composition. Crop out the small bit of flower at the left edge as well.
I can see how this represents serendipity, because the flowers are not where they should be. I like the way you've composed this as well, and the exposure is spot on. The geometry of the sidewalk works well too. One of my two favorites to ribbon.
This is excellent. Great sense of composition. Almost looks like an aerial shot of two forests of blooming pink trees, prairies and roads. Surrendipitous. 9
Lovely colors and shapes. I wish the little flowers were slightly more in focus but still sings of the idea of serendipity to me - finding gentle beauty in an unlikely place.