Since people seem to be hiding "unsolvable" puzzles...I figured I'd submit my own.
Cache is located at the following coordinates:
x13.891417 S x46.776217 W.
I will not be giving out any additional hints, so don't even think about asking. No gentle nudges, no confirming if you are on the right track. Nothing. Nada. Zip. Zilch. What's the point of placing a difficult puzzle cache if you're going to give out hints!
Enjoy.