Heading south towards Santa Gertudis, I stopped to admire this large cardon, which is probably several hundred years old.
The main cave has an impressive mural painted in red and black. I spotted some human figures and animals, but much of the painting is too faded or jumbled for me to make out. Some adjacent smaller caves are also painted.
Heading south again, I took a detour to see the ruins of a fancy old house at Prosperidad, east of Ejido Guillermo Prieto. It was interesting to see the contrast of the large modern irrigated farming operation at Ejido Guillermo Prieto versus the ranch at Prosperidad where they were still pulling water out of a well using horse-drawn buckets.
This old structure seems to be currently used by the Prosperidad ranch as an occasional sleeping quarters (note the bed) and slaughterhouse (note the walls splattered with something red).