"I found it!" Addison proudly proclaimed, as she used an iPhone and Global Positioning System (GPS) software to find the hidden geocache along the riverbank. Others in Lisa Bostick's fourth grade class were jealous, but there would be other geocaches to find. With the excitement of movies like "Pirates of the Caribbean" and "Indiana Jones" in the popular culture, who doesn't like the thrill of clues leading to hidden treasure? The recreational activity of geocaching, discussed in this article, offers exactly that. In a game of geocaching, participants navigate to a specific set of GPS coordinates and then attempt to find a geocache (container) hidden at that location. As a learning activity, geocaching reinforces the concepts of latitude and longitude while getting students outside of the classroom. It also helps students better understand issues of scale from the GPS screens and the cardinal directions when moving in the field to find these caches.