Geocaching is basically a high-tech treasure hunt using a GPS. If you are interested in learning more about this activity then I would recommend you look at the official geocaching.com web site.
I have been caching since June of 2002. I started with my son who is now out on his own and now cache with msteelee. While geocaching I tend to like to find personalized signature items, cache items that generally would have the makers user name on them, or at least an item the finder would somehow know where it came from. I collect these when I can, and you can see them as well as my signature items on my Signature Items page. On August 9th, 2003 I was featured in a newspaper article (alternate link) along with my son.
I may be contacted through geocaching.com, user name brdad.