There is no cache here. To find the actual location, you must complete our Highlights of the Lynn Woods Adventure Lab. You will find the Adventure Lab here: https://adventurelab.page.link/yDJA
But at these coordinates you will find the inviting deck of the clubhouse bar, overlooking the 18th green, at Gannon Munilciple Golf Course (affectionately known as Happy Valley, and also a part of the Lynn Woods). We recommend that you stop in for an adult beverage to celebrate your finds. It is open to the public.
We believe that the clubhouse was built during the Depression, at the same time as the Stone Tower, and the many stone entry gates and walls. The course was opened in 1931. Every stone used to build the clubhouse came from clearing the ground for the golf course.
Anyway, Congratulations on completing your tour of the beautiful and historic Lynn Woods, and we hope you had fun! Here is your bonus cache. For your planning purposes, it is within a tenth of a mile of the Great Woods Road parking lot. You will have one last hill to climb, but the difficulty level is based more on all the hiking required to discover the final coordinates.
Which are:
N 42 29.535
W 70 WO.ODS
You are looking for a small lock-n-lock. Congratulations to DoctoRxGreen and Geo-Knot for Co-First to Find.