For solve this mystery you must visit all the peaks of North Wicklow mountains... Hey, leave your boots and the sticks! Is a joke! Just do that if you are an eagle, for humans, let's try to do the same but just using our eyes.
The final location is:
N53 (1) (KIPPURE) . (WAR HILL) (DJOUCE) (CORRIG MOUNTAIN)
W006 (1) (MAULIN) . (SUGAR LOAF) (TONDUFF) (SEFINGANN)
To discover the final location of this mystery, you must solve the next puzzle. Can you locate the peaks of these mountains? Hope yes! So try your best locating them in the next map.
Once you know the exact place of each one of the peaks, locate it on the map and then you must sum the number of the left of the table with the number above the table, simply!
Can you solve the mystery without asking Google? Try it a couple of times, you know at least you will get it!
The final location is very near to Fairy Castle summit, so here is another peak. This one you should reach it if you want to sign the geocache, and no works if you are an eagle. Good luck!