This is the bonus cache for the adventure Lab, "You don't know Jack!" Congratulations on completing the adventure Lab! There are plenty other places to explore and caches to find here.
If you do not want to have a fun adventure, you can solve a puzzle to solve the puzzle. (thanks to Psychopuppy - I stole her idea for the extra puzzle, and she walked me through how to implelement it!)
www.jigidi.com/created.php?id=szywnepv