The area between Ringwood and Park Orchards contains a multitude
of small hills, valleys and creeks/watercourses. Until relatively
recent times, the terrain was generally considered unsuitable for
high density housing, and it was sparsely settled. More recently,
it has become feasible to build whole suburbs on such terrain, and
the area is gradually getting built up - with the result that it
has many short, twisty no-through roads often on prodigious
slopes.
The new estates, fortunately, often have lovely parks of remnant
bushland to relieve the monotony of suburbia - and this cache is
placed in one such area. It can be approached from a number of
different directions - part of the fun is guessing which may be
best, but be warned - looks may be deceiving 
The cache is a 1L Sistema container with the usual swaps - it
should be an easy find once you get to GZ.
Good luck!