Geocaching, also known as GPS Stash Hunting or GeoStash, involves “hiding” items, usually containers holding various “treasures” and then providing specific Global Positioning Satellite (GPS) coordinates for each “cache” on a website. Visitors to these websites can choose which “cache” they would like to locate using their own personal GPS. Cache searchers typically bring along their own “treasures” and make an exchange once the cache has been located.
Letterboxing, at its basic, is like a treasure hunt type game. Small boxes are hidden in various locations — usually outdoors, though many are planted indoors as well — and the creator of the box will release clues so others can go out and find them later. The box is expected to have a logbook that finders can log into and a unique stamp, usually hand carved, that the finder can stamp into their own personal logbook as a record of all the letterboxes they’ve found. Most letterboxers have a unique stamp to represent themselves, called a signature stamp, which they stamp into the logbooks found inside letterboxes.