Sitting in a Valley watering hole sipping a few cold ones, it's hard to imagine that human beings not so different from us were here, doing things, hoping for things, dreaming of things long before we were ever around. Occasionally, we must stare history in the face to recognize how far we've come and, perhaps, realize how far we have to go. There's no better place to do this than the Holbert Trail at South Mountain Park. Here, petroglyphs inscribed in the living rock by Hohokam People centuries ago. See abstract depictions of animals and hunters. Many have attested to the petroglyphs' spiritual significance. We don't like to bring religion into things, but it's hard not to feel something (spiritual or otherwise) when one bears witness to evidence of those who came before us.