Curious why not a fence? I'd class that as a fence and describe as "stone wall", just as I would "paling", "colourbond", "brick", "post & rail" in any of my boundary surveys where a "fence" is constructed on the boundary.
Beautiful old fence at Montsalvat artists community (previously a monastery). Taken in c.2007 with my Nikon Coolpix E5000 in RAW. Straight conversion in Photoshop, then run through my automatic PP action.
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