Your third and fifth photograph remind me of another Steemian @kus-knee who offered mundane art contests for awhile on things like manholes, tree bark, concrete etc here is an example of one of his posts he did a video gallery of the contestants. Enjoy @yuliana

https://steemit.com/mundaneart/@kus-knee/the-old-dog-presents-the-mundane-as-art-round-9-winners-moss-and-lichen