This is the bonus cache for the Adventure Lab Arizona's Natives via the P.V. Civic Center. Clues to the final coordinates for the physical cache are revealed as you play each of the 5 stages of the Adventure Lab. You can write each clue down as revealed, or, after completing the lab, go back to the Journal Entries and review the clues. The clues will be letters that will need to be unscrambled and put into the checker to reveal the correct coordinates for the physical cache with a log to sign.
You can validate your puzzle solution with certitude.