This stamp belongs to the 6-stamps sheet Grenzeloos Nederland ('Borderless Netherlands'), issued by Dutch post on 15 August 2016, and dedicated to Australia. It shows a map of Dirk Hartog island, named after the master of the ship Eendracht (meaning 'Concord' or 'Unity'), Captain Dirk Hartog. He discovered the northernmost tip of the island on October 25 1616, and was the first European who landed there.
More information about the stamp and the issue here.
I added this post to Sunday Stamps-II, this week's theme being Maps.