Challenge: 500 Questionable Caches Mystery Cache

This is a challenge geocache!  

Container is located at posted coordinates.

You must complete the challenge before logging a "Found It!"

To claim the smiley for this challenge you must have found geocaches totaling 500 or more Mystery Geocaches.  

Use the challenge checker and PLEASE post the qualifying geocaches, not just the verification.

As of the date of this publication, Geary&Co. have found over 650 Mystery caches