Geocaching is an outdoor treasure hunting game using GPS-enabled devices. Participants navigate to a specific set of GPS coordinates and then attempt to find the geocache (container) hidden at that location. Geocaching is often described as a "game of high-tech hide and seek".

For the traditional geocache, a geocacher will place a waterproof container containing a log book with pen or pencil and trade items then record the cache's coordinates. These coordinates, along with other details of the location, are posted on a listing site. Other geocachers obtain the coordinates from that listing site and seek out the cache using their GPS handheld receivers. The finding geocachers record their exploits in the logbook and online. Geocachers are free to take objects (except the logbook, pencil, or stamp) from the cache in exchange for leaving something of similar or higher value.

Geocaches have been placed in the garden during the non-growing season by neighborhood residents with the permission of the Garden Board of Directors.