This is a bonus cache for completing the Fox River Grove Adventure MOB Lab Cache.
The posted coordinates will take you to a Fox River Grove historical site, The Bettendorf Castle on Concorde Avenue. Sitting atop a hill off Route 14 near the railroad tracks. It was built by hand by Theodore Bettendorf, a tool and die maker, and is a replica of a castle in Luxembourg where Bettendorf grew up. It took 36 years to complete and includes many features of a real castle, including a working drawbridge, a moat, and a dungeon. Today, it is a private home and event space. Be sure to drive by the castle and check out their information on line you could schedule a tour after you navigate to the final coordinates you received from finishing the Fox River Grove Adventure Mob Lab cache. From this location you can view the castle as well through the trees.