Gosses Bluff meteor crater.
Known as Tnorala in to the Western Arrernte indigenous people. It is a erosian remnant of a 142.5 (+- .8) million year old impact crater.
The crater was caused by a commet core or meteorite 1km across. Originaly the impact crater was 23 K across. Now it is 5 K across and 150 meters tall.
The Arrernte have a legend about the crater being created by a child falling from the sky.