A national park located just 80 km from Sydney. It really is amazing to see the three sisters, down the track to the foot of the mountains and enjoy a walk through the eucalyptus forest. It's pretty cold here, I think it was the only time I had to put on my fleece in my entire Australian journey, but it's worth it. It's amazing that so few kms from the city is such a magnificent national park. The name "Blue Mountains" is due to the bluish touch the mountains have from the vapour emitted from the eucalyptus trees. Near the viewpoint is a rail which is well worth having a look at, as it's the world's steepest and is simply spectacular.