geocaching anyone?

I think this is something that would be awesome to do on rides. I did this with a friend today and it was actually quite fun.

Basically, someone leaves a "cache" of items in a particular location and publishes the GPS coordinates, and sometimes some clues that lead to where to find the cache...sometimes its even kind of like puzzle to work out what the real coordinates are from a given set of starting coordinates.

If you find it, you either swap something out or add something to the cache and fill in a logbook usually at the cache that you visited it, then leave for the next person to find.

http://geocaching.com.au/