Cache is not at the posted coordinates but is within a mile of the posted. I took the idea of this puzzle from a cache I found in St. Louis that was placed by C3GPS.
Cache can be found at 25B52A494A8F.
I've had occasion to explore this corner of Burr Ridge lately and have discovered a new park that was amazingly cache free.
There's a small mechanism holding this cache in place. Please be careful with it.
Qba'g qebc vg va gur cbaq.