But what Arnhem Land offers goes deeper than wilderness because embedded in these rocks, in the overhangs and caves and great sandstone panels of the escarpment, is the largest known collection of rock art in the world, galleries upon galleries of it, tens of thousands of years of human history pressed into stone.

Ultimately, there's many different styles of art, and a lot of them coincide with different climatic changes over tens of thousands of years.

There are petroglyphs here, which is basically where it's carved into the rock, not so much in, in so much as pictures.

It's more sort of smaller holes like pock holes, and, and often it's things like where they'd sharpen a spear or similar.

The art in itself is, is art.

It's paint on rocks.

And there's a couple of different mediums as well.

But why here? Why is the arts of this place more prolific than anywhere else on Earth? The answer, Greg says, is simpler than you might think.