Geocaching is an outdoor game that most often involves the use of a Global Positioning System ("GPS") receiver or traditional navigational techniques to find a "geocache" (or "cache") placed anywhere in the world. A typical cache is a small, waterproof container containing a logbook and "treasure", usually trinkets of little value. Participants are called geocachers; those not familiar with geocaching are called geo-muggles or just muggles, a term borrowed from the Harry Potter series.
Geocaching is similar to a much older game called letter boxing. The major difference is its use of the GPS and the Internet.
Geocaching is a fun way to enjoy the great outdoors!
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Geocaching & GPS - It's FUN! Sweeping the USA and the World!