This cache is a challenge cache:
It is at the posted coordinates, even though it is an "unknown" cache type.
You are not allowed to log a "find" without proof that you qualify by completing the caching related "challenge" below, but you can make a write note.
The Challenge:
To log a "Found it" for this Cache in addition to finding the Cache and signing the logbook you must have:
Found at least one Cache each day for 100 consecutive days.
All Cache types qualify as finds.
You can attach a proof to your log (optional).
Logs that don't fulfil this condition will be deleted without any comment.
As the owner of a Challengecache I have to fulfil the cache condition myself.
https://project-gc.com/Challenges/GCA5KVG/75692