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The Three Sisters sandstone rock formation, one of the region's best-known attractions (author: JJ Harrison, 2010).

Blue Mountains, New South Wales

  The Blue Mountains are a dissected plateau carved in sandstone bedrock. They are now a series of ridge lines separated by gorges up to 760 metres (2,490 ft) deep. The highest point in the Blue Mountains, as it is now defined, is an unnamed point with an elevation of 1,189 m (3,901 ft)

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