This co-ordinates for this cache are available when you have completed the Historic Walton Adventure Lab caches. Upon completing the fifth and final stage, the Old Lifeboat House, the co-ordinates for this mystery cache should appear.
This cache is part of a series of six different icons to be published to celebrate RachelnRedd's 10th geocaching birthday.

Evtug unaq pbeare bs envfrq sybjre orq, ohg ba ybjre yriry.