The Greater Blue Mountains Area is a World Heritage Site located in the Blue Mountains of New South Wales, Australia. The 1,032,649-hectare (2,551,730-acre) area was placed on the World Heritage List at the 24th Session of the World Heritage Committee, held in Cairns in 2000.^[1]

Etymology

When the atmospheric temperature of the region rises the essential oil produced from the eucalyptusspecies evaporates and disperses in the air, causing visible spectra of sunlight to scatter. The scattering causes the shorter wavelength colors (blue) to propagate more than the longer wavelength colors (red). This causes reflections from the mountains to appear bluish to human eyes, giving the mountain region its signature name, "Blue Mountains.