Thanks to Neoaddict
On the Geocaching web site, click the "Hide and Seek A Cache" link, click the "Or, Seach With Google Map" above the Latitude Longitude Search section. In the "Zoom to Address" window enter the state park your searcing for: example "Whitewater State Park: Minnesota". Select the cache labeled with the "History Challenge" click on the title in the pop up window and you will finally get the coordinates.
Good Luck, Have Fun Searching