In order to find this cache, you must complete the "A Christmas Neighborhood Story" Adventure Lab.
You will need a smart device with wifi and GPS capability to complete the Adventure Lab, which requires visiting the five locations of the Adventure Lab and answering a question at each one to earn a find. Completing the Adventure Lab will add five lab cache finds to your total. The stops need to be completed in order.
Download the Adventure Lab app to your smart device and look for "A Christmas Neighborhood Story" in the directory, or you can go directly there with this link. Click here to go to A Christmas Neighborhood Story
Once the Adventure Lab is completed you will be given the last 3 digits of the North and West coordinates for this bonus cache in the final journal entry. Enter the last 3 digits into the Solution checker to get the cache location.