Convenient access to this part of the park can be obtained from Queens Gdns, Bundoora or Goolgung Grv, Greensborough.
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This "Palace" reminds me so much of growing up in Ferntree Gully in the 1950s when we kids built huts in the bush.
While in the area take the time to appreciate the native eucalypt forest and understory with all it flora and fauna. See the sights and sounds of Plenty Gorge Park at -- https://www.youtube.com/watch?v=3Z2bpVTmSfs
The cache is a good sized plastic screw top container with room for swaps and TBs