Geocaching is an increasingly popular outdoor recreational activity, in which participants use a Global Positioning System (GPS) to hide and seek containers, called “geocaches” or “caches”. A sort of high-tech treasure hunt to find navigational positions where other people have hidden an item of interest anywhere in the world.
A typical cache is a small waterproof container containing a logbook and a small item. The geocacher enters the date they found it and signs it with their established code name. After signing the log, the cache must be placed back exactly where the person found it. The item may be exchanged for another or left in the cache.