Geocaching is an outdoor recreational activity, in which participants
use a Global Positioning System (GPS) receiver or mobile device and
other navigational techniques to hide and seek containers, called
"geocaches" or "caches", at specific locations marked by coordinates
all over the world. As of 2021 there were over a million active
players in the United States. Geocaching can be considered a
Location-based game. A typical cache is a small waterproof container
containing a logbook and sometimes a pen or pencil. The geocacher
signs the log with their established code name and dates it, in order
to prove that they found the cache. After signing the log, the cache
must be placed back exactly where the person found it. Larger
containers such as plastic storage containers (Tupperware or similar)
or ammo boxes can also contain items for trading, such as toys or
trinkets, usually of more sentimental worth than financial. Geocaching
shares many aspects with benchmarking, trigpointing, orienteering,
treasure hunting, letterboxing, trail blazing, and Munzee.
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