Geocaching

Geocaching is an outdoor recreational activity in which the participants use a Global Positioning System (GPS) receiver or mobile device and 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 code name. Larger containers such as plastic storage containers (Tupperware or similar) or ammunition boxes can also contain items for trading, usually toys or trinkets of little value. Geocaching shares many aspects with benchmarking, trigpointing, orienteering, treasure-hunting, letterboxing, and waymarking.

Geocaches are currently placed in over 200 countries around the world and on all seven continents, including Antarctica, and the International Space Station. After nearly 13 years of activity there are over 1.9 million active geocaches published on various websites. There are over 5 million geocachers worldwide.