This walk starts at the most popular lookout in the Blue Mountains and passes one of Australia’s most famous landmarks The Three Sisters. After descending into the valley and enjoying the views along the bottom of the cliffs you catch the scenic railway back up the hill. With great views of the valley and a beautiful forest environment this is a popular walk. All the more because at the end the world’s steepest railway is available to take walkers back up to the top of the cliffs. This walk is not suitable for people with heart or breathing difficulties and for those with a fear of heights.