Uluru (formerly Ayers Rock), is a massive sandstone rock formation located in Australia's remote Northern Territory. Measuring 9.4 km around its base, the rock is a revered and sacred site to the local Aboriginal people, who reference it widely in their legends about the creation of Earth. The sole geological feature in an otherwise flat, arid corner of the continent, Uluru is believed to possess mystical powers, due in part to the dramatically varying colours it displays with the changing angle of the sun-from blood red to searing ochre and deep purple.