Geocaching Australia

I found a cache near the National Museum of Australia in Canberra, hidden on a metal sculpture. I signed the log. It is a magnetic, flat, black key holder, and the only identification is the writing "Canberra is So Boring!" written on the log, plus replaced 14/9/8. There are a list of names, including recent names of people who no doubt stumbled upon it like myself. In fact, the one who I contacted and was polite enough to reply, said just that. There was no GC or GA number.
Does anyone know anything about this, or how I could possibly log my find?

Ignore this. I just discovered where to find and log it. First log in over 3.5 years.

Opencaching?

Yes, SecretSquirrel-BJC archived a bunch of caches without removing the containers...

I also found a cache on Red Hill a couple of days ago; not published yet.