Blue Mountains

.The National Pass, a famous part of the hike at Wentworth's Falls. Not for those scared of heights.

The cable car at Scenic World, Katoomba

The distinctive blue horizon of the Blue Mountains.  Where does the blue come from?  Well, The Blue Mountains is densely populated by oil bearing Eucalyptus trees. The atmosphere is filled with finely dispersed droplets of oil, which, in combination with dust particles and water vapour, scatter short-wave length rays of light which are predominantly blue in colour. So now you know!  Consider yourself enlightened!