The cache is hidden in Paruna Reserve which runs alongside the Woronora River in Como. There's a beautiful walkway which runs the length of the reserve, from the end of Woronora Crescent all the way to Central Avenue. You can enter the reserve from either of these locations, although Woronora Crescent is definitely the closest entry point.
The cache is hidden near a rocky outcrop by the river. There's a walking track most of the way in but you may need to scramble over and around some rocks towards the end. Regular size plastic container with a logbook and pen.