Note - These two wherigo caches will be archived at the end of 2025
The main 21st Anniversary wherigo cache requires walking around the park until you have found all 20 items.
You will get the coordinates for this cache, and a picture hint, added to your inventory after leaving the area where you found your tenth item.
Both caches use the same wherigo cartridge which can be found here.
Note as this is a half way cache, the cache area will not be displayed on the wherigo.
It is still quite an accomplishment to get this far, hense the fairly high D/T rating.
Please see the main cache, GC9GJF6 for more details.
The cartridge can be downloaded from here