Fantastic work, you’re almost there.

The final prize can be found at the coordinates below. As a precaution against this site being found accidentally you’ll need to decode them, but you should already know what to do here. You will need to deal with a padlock as well, but if you’ve fully solved the first two parts of this puzzle you already have the code.

negative -0.707,-0.707,-0.966,-1.000,-0.766,-0.996,-0.766,-0.866,-0.707

I recommend making the trek an hour before sunset, and feel free to bring some small art supplies. If you do journey to the end, and I hope you do, please make sure everything is locked, hidden, and put back how you found it.

Something is hidden behind this rock. A rock with a secret

Good luck!