The cache is not at the posted coordinates
This is a simple two-part multi-cache, go to the posted coordinates and look for an unusual/different headstone. What is the word that is missing from this statement? "HERE REST'S A _____ OF THE WORLD."
Enter that word into the Certitude checker and if correct, you will get the coordinates and a clue of where to find the container
The cemetery is open from 9am to 4:30pm but you should be able to answer the question even if the gates are locked.
Please be respectful of the cemetery grounds
The container location is not in the cemetery

You can validate your puzzle solution with certitude.