If you haven't heard of GeoCache, look it up on Google or something.
I am a big fan of GeoCaching. If you know what it is, hide on your favorite Minecraft server! (Not White-listed)
If you hid one, tell me like this.

1. IP
2. Co-ords
3. Prize

Tip: Do NOT bury it. If your in a cave, find a place to put it. You can't hide behind stone or something.

I'm extremely excited to see what sorts of ways you can come up with for hiding it. Happy Caching!!!