TrailRun: Unfortunately I have to archive this cache, and the container has been picked up.
A lot of people really enjoyed this one, not because of the cache, but because of the artesian well and nice surroundings in this less visited part of Waterfall Glen. I'd recommend a visit to the established trails in this area whether or not there is a cache to find.
It's in an area the DuPage Forest Preserve has designated as not being available for GeoCaches (all of southern Waterfall Glen).
I did not attempt the permit process, because it's pretty clear the cache would not be allowed at this location.