This is a bonus cache for the Nebraska Historical Markers at UNL Adventure Lab. To get the coords you will need to complete the adventure lab and get letters from each stage. These letters will spell a single eight letter word which you can enter into the checker for the final coordinates.
You can validate your puzzle solution with
certitude.
The Nebraska State Historical Society is responsible for commemorating significant events, people, places, sites, movements, and traditions in Nebraska history by coordinating the erection of historical markers. See the Nebraska Historical Marker Program for more information.
https://labs.geocaching.com/goto/a45e87ed-e07d-4299-a142-6a949c459cb5