The Blue Mountains
This is the rock formation known as the Three Sisters, there's a folk tale attached to that name. According to the tale the three sisters were three aboriginal sisters who were transformed into stone by their witch doctor father, in order to save them from a monster (Bunyip).
There are metal stairways leading down the side of the rock formations. I only went half the way because I don't think I have what it takes to make it back up if I go all the way down. ;)
