....firm ground!
Terrain 5 due to the fact you will need some special equipment to make the grab. I recently bought mine and wanted to use it some more.
At the posted coordinates is a metal plaque embedded on the top of a stone wall titled "Welcome to Cotswold Overlook". The wall is towards the south end of a circular stone wall that goes around a water fountain that consists of 1 large stone block.
Once you find the plaque it will have clues to the final cache location. The final is at:
N 39° 15.ABC' W 84° 28.8DD'
The owners who gave GPHC some of the land acquired it in 193A
"Upon her death in 19BC....."
"The park district later acquired an additional 23D acres...."
Sum check : A+B+C+D = 26
You are looking for a small tube hanging in an evergreen (cedar?)
Please replace as you found it (or tell me if you couldn't)