Links in this category of editors choices cover some of these topics:
heritage, natural, world heritage areas, aboriginal, indigenous, cultural, architectural

• Environment Australia - Australian and World Heritage [aus]
  • natural and cultural heritage, World Heritage Areas, shipwrecks
• Australian Antarctic Division [aus, ant]
• Department of Conservation [nz]
• New South Wales National Parks and Wildlife Service (NPWS) [nsw]
  • parks and reserve management, state recreation areas, nature reserves, Aboriginal sites register, cultural heritage
• Tasmania Parks and Wildlife Service [tas]
  • natural and cultural resources management, history and heritage, World Heritage Areas, National Parks and Reserves
• Australian Heritage Commission (AHC) [aus]
  • natural, indigenous, historic, cultural, Register of the National Estate (RNE)
• Department of Lands, Planning and Environment (DLPE) [nt]

Region codes [aus, nz, ant, ...] indicate the state or country that each site is relevant to.