THE CACHE IS NOT LOCATED AT THE POSTED COORDINATES
If you go to the posted coordinates you can have fun at the playground, but you will NOT find the cache. The parking that is close to playground will work to find the cache.
To find the final for this mystery cache, you will need to complete the Adventure Lab "The Secret Gardens". After completing each of the 5 lab caches, you will see numbers for the final coordinates appear. After the 5 lab caches are complete, combine your answers to form the final coordinates.
The cache difficulty reflects the difficulty to get the coordinates, not the hide. The terrain reflects the hide.