Uluru & Kata Tjuta
But Uluru is first of all a sacred place for the aboriginals. They read stories in its landscape, and tell them if you take time to listen.
If you want to start discovering, I would advise you to read books like The songlines by Bruce Chatwin, and Arthur Upfield books.
Also emerging from the flat ground, Kata Tjuta is a group of hills named the Olgas in English. While Uluru is one enormous rock, Kata Tjuta is made of boulders held together by a red “cement”, so erosion has cut gorges between the hills.
You can walk a long time among these hills, and discover the flora and fauna of this desert which is all but barren.