This is a micro on a nice walkway through Knowledge Park. The cache
IS HIDDEN at the posted coords but there is a reason that
this is a Mystery Cache. The twist of the cache is that when you
log your find on-line, you must also log a DNF. If not... POOF...
your find will magically disappear. Have fun with your DNF log. Be
creative.
Actually I won't delete your find if you don't post a DNF but I
hope you still do in the name of fun. 
For your info...
The DNF is an important part of Geocaching. Without posted DNF's,
cache owners wouldn't know if there is a problem with their caches.
But for some reason, maybe an unnecessary fear of embarrassment,
there are lotsa cachers that avoid posting DNF's like the plague.
Well, I won't I.D. any of them here but if they want to find this,
I'll bet I see a DNF from them now. Hehehehe.
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Tprints' DNF Total = 539 (Boy do I suck)
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I'm going to use this part of the cache page to keep track of my
own DNF total. Hopefully this will show that there's no shame in
posting DNF's. I have now officially passed the big milestone of
500 DNF's! Woohoo!
If you want to see how many DNF's you've posted online just
follow these instructions...
1) Open up your "My Account" page
2) Click on the "Geocaches" link along the top row of links
3) Now click on the "Didn't Find It" link in the Show section
4) Your total DNF's is number next to "Result" in the top left
There is no need to post your own DNF total here unless you want
to. I just thought you might like to know the easy way to find your
DNF total.