This bonus geocache is NOT at the posted coordinates.
First, you will need the Adventure Lab app available from the app store on your smart phone.
You will then need to complete the "Journey Through the Kingdom of Broomfield" Adventure Lab
in order to get the final coordinates and instructions on how to access the physical container.
https://labs.geocaching.com/goto/broomfieldkingdom
You will have 5 stops to complete before you recieve a the final coordinates. .
They will be listed on the final entry and will be a short walk from the last stop.