Briefly defined, "geocaching" is high-tech treasure hunting for items of little or no value which have been intentionally placed by other geocachers. For more details, check out Geocaching - The Official Global GPS Cache Hunt Site.
We were in Flagstaff over the weekend and found 3 geocaches within walking distance of our hotel. One was hidden in a pile of fake dog poo (the first time we've ever seen one of those!).
Anyone else try this unique hobby?