The cache is not at the posted coordinates!
To find this cache, you will need to complete the nearby Adventure called "Strike Up the Band!"
The final cache is located at N 41° 46.3AB' W 88° 08.CDE' ... and the stages of the adventure will each contain pieces of the coordinates.
For the Adventure Lab: park hours are from sunrise until one hour past sunset.
For the final: STEALTH IS REQUIRED.
You must find the physical cache and sign the log to claim a find. Merely completeing the Adventure is not enough. Please bring your own pen.