Geocaching started around 2000 and its popularity is growing. Anyone with a reasonable level of physical mobility can do it. You need two things to geocache: access to the internet in order to view and download details of where the geocache is hidden and a mobile device with GPS to guide you to the cache.
The main geocaching website is Geocaching.com. On 5 July 2007, it listed 422,892 active geocaches worldwide. Other geocaching websites include: Earthcache, Terracaching and Navicache.
