Here’s an article from travelwisconsin.com entitled A Wisconsin Guide to Geocaching.
http://www.travelwisconsin.com/blog/things-to-do/a-wisconsin-guide-to-geocaching
“Imagine a real-life treasure hunt. Just you, your GPS and the great outdoors. It’s hot, it’s exciting and it’s a big hit here in Wisconsin. We’re talking about geocaching!”
“The great thing about geocaching is that cachers have another way to explore all around Wisconsin. Hidden gems you might not otherwise find in a tourist listing. Interested yet?”