this is a hole that an ancient person or several people made. it was created approx 3000 yrs ago, possibly by nabataeans:
https://en.wikipedia.org/wiki/Nabataeans
they were people of commerce and traveled with goods across the desert. this nearly impossible feat they achieved by creating these "water bottles" inside the rock itself. look - this hole has a lid! and the paths leading to it allow the water to accumulate in the short rainy season.
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when you travel the desert you stop, drink, and leave the rest for someone else. no need to brand it. no need to put guards or a lock. it's simply there for whomever needs it.
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