This cache is not at the posted coordinates.
This is the bonus cache for the "San Rafael's Forgotten History" Adventure Lab. You will receive a portion of the coordinates for this cache at each stage, put them all together and stop by here afterwards.
Check out the lab at https://adventurelab.page.link/hpNZ or scan the QR code below:
You can validate your puzzle solution with certitude.
A big thanks to J5 Crew for the container, which I got from Septentrio (NORTH).