The cache is not at the posted coordinates!
You can obtain the coordinates to this cache by participating in the associated Adventure Lab. .
This is a bonus cache for completing the Adventure Lab "Sheboygans's Secret Oddities."
The cache is available 24/7. Permission has been granted, but stealth may be required at certain times of the day. The difficulty/terrain accounts for the effort required with the Adventure Lab. Once you have the coordinates, the cache itself is a 1.5/1.5.
Geocaching Adventure Lab caches can only be found with the use of a smartphone or tablet using geocaching.com's free Adventure Lab app.