The cousins and I packed up for a little getaway to the Blue Mountains. Where does the term Blue Mountains come from? It is derived from the blue tinge the range takes on when viewed from a distance. The tinge is believed to be caused by mie scattering which occurs when incoming ultraviolet radiation is scattered by particles within the atmosphere creating a blue-greyish colour to any distant objects, including mountains and clouds. Volatile terpenoids emitted in large quantities by the abundant eucalyptus trees in the Blue Mountains may cause mie scattering and thus the blue haze for which the mountains were named. ~ Wikipedia
It is pretty incredible. We posted up in a nearby cabin after taking in the views and the following day we checked out the Jenolan Caves nearby which also blew my mind. Only 50 km outside Sydney, the Blue Mountains is a must see if you are passing through the capital.