Though there's an enormous amount of archaeology (mainly prehistoric rock art, but several Ancestral Puebloan structures, too, within a mile or so) in the immediate area, this structure in entirely 'modern.' I don't know who built it, when exactly (most likely in the 1970-80's), or whether there's any significance (other than being design elements incorporated to showcase the builder's superb craftsmanship) to any of the designs. Some of these questions could probably be answered, but the closest neighbor (a hundred yards away?) is something of a pain in the butt. Can't really fault the guy, though; tourists are constantly stopping and trespassing on his narrow strip of land between the river and the cliffs.