I am not actually certain that my photos fit into the parameters of this month’s challenge. I will post them here and leave it to the committee to judge. ;’-)
I think these letter slots are polygons enclosed in big polygons.
And these polygon bricks are surrounded and enclosed by each other polygons.
There were two kinds of these polygons in a polygon on my ride today. (New Year’s Day ;’-)).
Now to await the judges’ call.