Cache is not at posted coordinates. Finish the adventure lab and the coordinates will be revealed at a random stop.
https://adventurelab.page.link/xJeg
The Three Rivers Petroglyph Site is one of the few locations in the Southwest set aside solely because of its rock art. It is also one of the few sites giving visitors such direct access to petroglyphs. The number and concentration of petroglyphs here make it one of the largest and most interesting petroglyphs sites in the Southwest.
This area is rich in history and so much fun to explore. After completing the lab and finding the bonus cache continue on up the road to the Santo Nino de Atocha Cemetery and mission. Enjoy the views of Sierra Blanca and soak up the beauty.