The cache is not at the posted coordinates. Instead solve the puzzle to get the coordinates. The difficulty is mostly related to puzzle.
"Dear professor. I think I made a major discovery. I found this tiny pyramid and I think it reveals the location of a real Egyptian treasure, maybe even an undiscovered pyramid. I took the effort to write out all the hieroglyphs for you and hopefully you can decipher it and we can make a huge discovery. See attached picture."
"Dear John. Ugh, you made it way more difficult for me than it needed to be. Next time, just take pictures. Also it does not give the location of a pyramid in Egypt. It is the location of a Geocache in Rome. GA"
You can validate your puzzle solution with certitude.