The cache is not at the posted coordinates! This is a bonus cache for completing the Adventure Lab Waukesha Springs Era https://adventurelab.page.link/uVUJ. Your adventure can begin after downloading the Geocaching Adventure Lab mobile app from Groundspeak (geocaching.com).
Geocaching Adventure Labs can only be found with the use of a smartphone or tablet using geocaching.com's free Adventure Lab app.
As you complete the 5 part adventure lab, the coordinates for the actual location of the bonus cache will be revealed on the journal page when you are closest to it. The bonus cache is a quick park and grab in a city of waukesha Park.
I hope you enjoyed my short tour of the historical Waukesha Springs Era.