Puzzle, cache and placement: CJ-Curry
Thanks to LouiseAnn for pointing out an error!
The given coordinates are false.
The coordinates in the picture below match the (false) given coordinates. The true coordinates are staring right at you.
Note: in my absence, my caches are being maintained by Archie B1 & B2 and SanguineDragonflye. For puzzle hints or solution checks, feel free to contact me directly.