Maria Island is just south of the Freycinet peninsula. This is a view from the top of the walk up to Bishop and Clerk, the two most prominent outcrops on the northern end of the island. Maria Island is a great spot if you want to do a few day walks. You can stay in the old penitentiary and spend probably 2 or 3 days walking around the northern end of the island. If you've got a bicycle and like bush camping, you could probably spend a week there. There are no cars, but it looks like there are a good number of reasonable firetrails that would let you explore much more of the island.