From Wikipedia:
Geocaching was originally similar to the 160-year-old game letterboxing, which uses clues and references to landmarks embedded in stories. Geocaching was conceived shortly after the removal of Selective Availability from the Global Positioning System on May 2, 2000, because the improved accuracy of the system allowed for a small container to be specifically placed and located. The first documented placement of a GPS-located cache took place on May 3, 2000, by Dave Ulmer of Beavercreek, Oregon. The location was posted on the Usenet newsgroup sci.geo.satellite-nav as 45°17.460′N 122°24.800′W
By May 6, 2000, it had been found twice and logged once (by Mike Teague of Vancouver, Washington). According to Dave Ulmer's message, this cache was a black plastic bucket that was partially buried and contained software, videos, books, food, money, and a slingshot. A geocache and plaque called the Original Stash Tribute Plaque now sit at the site.
The activity was originally referred to as GPS stash hunt or gpsstashing. This was changed shortly after the original hide when it was suggested in the gpsstash eGroup that "stash" could have negative connotations and the term geocaching was adopted.
Over time, a variety of different hide and seek type activities have been created or abandoned, so that "geocaching" now may refer to hiding and seeking containers, or locations or information without containers.
We will be meeting at a Cup of Common Wealth and across the road at Thoroughbred Park so we do not overwhelm the coffee shop's facilities with geocachers on top of their normal patrons who will be there. We will of course pose for group photos and there may even be "big blue switch" there to pose with.
Come celebrate this day in history that has since keep us busy poking around at bushes and trees, lifting up lamp skirts, and finding those unusual piles of sticks,rocks, whatever you can pile up to hide something.