Famous tourist attraction: The 3 Sisters Sandstone Rock formation The Blue Mountains is a rugged region west of Sydney in Australia’s New South Wales. Known for dramatic scenery, it encompasses steep cliffs, eucalyptus forests, waterfalls and villages dotted with guesthouses, galleries and gardens. Katoomba, a major town in the area, borders Blue Mountains National Park and its bushwalking trails. Echo Point affords views of the storied Three Sisters sandstone rock formation. | Australia-Phil