Cache is not at posted coordinates.
Welcome to the "The 12 Days of Cachemas", a cache series running from December 25 to January 5 modeled after a familiar Christmas song. Starting on December 25th, one new cache in this series will be released each day, until "The 12 Days of Cachemas" song is complete. Each cache in this series will contain a clue. Collect all the clues to figure out the location of the 2021 Cachemas Bonus.
To discover coords, simply identify the 10 pipers below, then let this one help you out:
N 37° and W 77° are given.
You can validate your puzzle solution with certitude.