The Blue Mountains, west of Sydney, have been inhabited for millennia by the Gundungurra and Darug people.
When Europeans arrived, the rough terrain was considered an impassable barrier.
Today marks 200 years since explorers Blaxland, Wentworth and Lawson forged a crossing.
It opened up the rest of New South Wales to settlers.
Now the local community is reflecting on the achievement and the changes it wrought.
Watch the video above for the full story.
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