Past Jessie Gap you drive over eroded flats before entering a valley between red ridges. Corroboree Rock , 51km from Alice Springs, is one of many strangely shaped dolomite outcrops scattered over the valley floor. Despite the name, it's doubtful the rock was ever used as a corroboree area, but it is associated with the Perentie Dreaming trail. The perentie lizard grows in excess of 2.5m, and takes refuge within the area's rock falls. There's a short walking track (15 minutes) around the rock.