500 UNKNOWN CACHE CHALLENGE

You must have found at least 500 Unknown Cache types in any period of time

Check to see if you qualify for this challenge using the link below. You may sign a challenge cache's physical log at any time. However, the challenge cache may be logged as found online only after the log is signed and the challenge tasks have been met and documented.  Include your qualifying finds in your log (the link can be copied from the Project GC page).

The cache is at the posted co-ordinates.

This challenge complies with the 2016 Challenge Cache Guidelines, which can be found here.