I recently discovered geocaching.  For those who don't know geocaching is a form of treasure hunt.  Participants use some form of GPS to locate "caches" which are the treasure they are seeking.  A typical cache consists of a waterproof container, a log book, and some type of treasure.  The name was originally gpsstashing, but it was suggested that stash may have negative connotations so the name was changed to geocaching.  There are a number of sites that are dedicated to the pastime and there are caches located in over 100 countries and on all seven continents.  The first geocache was placed on May 3rd, 2008 and it was first found and logged on May 6th, 2008.