Some Aboriginal Australian cultures have folklore describing the rise of sea levels at the end of the last ice age. Also, Songlines are fascinating.
In the documentary "The Journey of Man: A Genetic Odyssey", they say that the Aborigines are the survivors of the very first migration out of Africa. They went through the middle-east, moved through South India and thence to Australia and hence have DNA links to some South Indians/Sri Lankans.
Because they were isolated from the latter migrations, they have preserved much of the "true" Human archaeological history in their oral (and other) narratives. Anthropologists call this "Deep Time" oral histories.