When you find this virtual cache, you will have paid for something that you can use as a proof of your succes. But be creative, and find other ways to prove that you were on this location.
And a little quiz: why is it called Throatwobbler Mangrove?
Guvf ybpngvba vf vafvqr n zbahzrag. Lbh jvyy unir gb cnl €4 (vg hfrq gb or 4 QZ) gb ragre. Lbhe gvpxrg pna or n cebbs bs lbhe ivfvg. Vg'f bcra rirel qnl qhevat qnlgvzr.