Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing service for geocaches around the world.
Geocaching is a high tech treasure hunt that utilizes a GPS receiver to determine a cache's location. Coaches are hidden all over the world by geocachers who post latitude and longitude coordinates online and challenge other to find them. A GPS receiver can pinpoint one's location anywhere on the Earth to within several meters.