The Blue Mountains is 60 to 180 kilometres west from the centre of Sydney in New South Wales. This sandstone plateau ranges from 100 metres above sea level to 1,300 metres at the highest point.

At the Blue Mountains there are ninety one species of eucalypts. There are also mallee trees, heathlands, localised swamps, wetlands and grassland.

There are 400 kinds of animals that live there. Some are the spotted tailed quoll, the koala, the yellow-bellied glider, the long-nosed potoroo, the green and golden bell frog and the Blue Mountains water-skink.

The Blue Mountains appear blue because it is covered in eucalypts, which put droplets of oil into the atmosphere. The blue light-rays of the sun scatter in the oily mist and make the mountains appear blue.