For centuries, the canyon and pool now known as Keyhole Sink was a place where the Cohonina people hunted and conducted religious ceremonies. Petroglyphs at the site dating to around 1,000 years ago indicate that hunters used the natural dead-end to corner prey that gathered at the watering hole. Curiously, despite the area being a rare source of fresh water in the arid region, archaeological evidence doesn’t indicate that people settled permanently at the site. The images marked onto the volcanic basalt rock mostly show animals that were probably encountered…
