What is geocaching?
People use a Global Positioning System (GPS) receiver or other
navigational techniques to hide and seek containers, called
"geocaches" or "caches", anywhere in the world. A typical cache is
a small waterproof container containing a logbook where the
geocacher enters the date they found it and signs it with their
established nick name or "handle".
Larger containers such as plastic storage containers (tupperware
or similar) or ammo boxes can also contain items for trading,
usually toys or trinkets of little value. Geocaching is often
described as a "game of high-tech hide and seek".