This cache is one of the Team Adventure caches, of which there are many around Australia.
There is at least one Team Adventure cache in every state of Australia. Inside each cache, there is a 'Number'.
To complete the 'All States - Team Adventure', at least one cache in all of the six states must be located and all six numbers collected. With all six numbers collected, you will be able to ascertain the final coordinates for the 'All States - Team Adventure' cache.
How you can go about this, is explained in the 'All States - Team Adventure' The cache GC number is GC9861C
Happy caching!!