CACHE IS NOT AT THE POSTED COORDINATES! (Sorry to yell..)
Do you know about the Project A.P.E. Geocaches? If you don't, definitely read up on them. One was quite close to here (near Lake Needwood). Only two are still active. I was lucky enough to visit the one in Washington state last summer. I took a picture of my caching buddy Soccertoa to help me remember this special find. This one won't get you the cool APE icon but maybe it will inspire you to travel to Washington state or to Brazil.
Solve the puzzle to get the coordinates.
https://www.jigidi.com/s/w5uqft/
You will be looking for a silver nano.