You can even buy (or sometimes win in a drawing) tags
in which you can attach to something. These are called
travel bugs and they get picked up from one geocache box
and put into another box some place else.
I have a travel bug that is going around the world. It
has been on the "move" since October 9, 2004. It has
traveled about 23,621 miles, and is currently in Prešovský
kraj, Slovakia.
The following link is to MY travel bug:
http://www.geocaching.com/track/details.aspx?id=109960
Here is the website for geocaching if anyone is interested
learning more about it.
http://www.geocaching.com/