The Blue Mountains were formed around one million years ago. There is no wonder there is so much history around this area. The Blue Mountains is densely populated by oil bearing Eucalyptus trees. Thus the atmosphere around them is filled with finely dispersed droplets of oil, which, when combined with dust particles and water vapour, make a blue visual effect.
The Blue Mountains are about a 90 minute drive from Sydney. There are eight connected conservation areas in the World Heritage area, all full of dramatic scenery of cliffs and waterfalls and full of amazing walks and hikes. Free for all to enjoy nature and even spot a few creatures. Though be careful not to step on snakes or legless lizzards like this one! (See if you can spot the ears)