We have started a new sport I suppose you can say, geocaching.  We have gone out on three caches and have yet to find one.  Actually went out on the same one twice, because it's so close to my house supposedly. 

N is enjoying going out on them.  I explained to him that this was like a treasure hunt.  And while we were out on one yesterday, I realized this is a good way to get out to discover nature, or just discover what's in the community.  But I want to find the one near by.  And since this is a new sport, I don't if the treasure that is hidden is actually hidden in the ground tree, is it marked or unmarked.