I would make at least four wall hangings out of four single pictures. I was thinking you could paint a little bit with those Shiva oil sticks, like just a little green in a tree or red on a roof, whatever you want to highlight. What a find!
It looks like you have enough to also make several quilts with some green or red borders. I don't know why, those are the colors that are calling to me... I think little nine patches in scrappy prints, either in primary colors or black and white for borders or sashing.