GeoCaching, do you do it?

I am fairly sure that computer gaming is not the only hobby anyone on this site does. So I was curious to know if anyone goes Geocaching and if so have you ever found anything cool or what was the most impressive cache you have found.

For those in the dark Geocaching is a modern world wide Treasure Hunting game, that is played use a GPS and boxes hidden by other player in random location all around the world.

Here is a link for more info.

Anyway my family and I just starting yesterday and we had a blast. So much so that we are going out again to find some caches closer to our home.