Aussies have taken to social media to criticise tourists who scaled a 1.6m-tall fence to take pictures from the top of Wedding Cake Rock, south of Sydney.
The precarious cliff ledge, accessed via a National Park walk from Bundeena, is fenced off, with officials having warned for years the dangers of the site.
A 2015 report said that the famous cream-coloured ledge could collapse at any time "without warning" into the sea below.
At the time, the National Parks and Wildlife Service (NPWS) said that the ledge was "precariously balancing on the edge of the cliff and severely undercut".
Since then, the NPWS has twice erected fencing at the site, threatened fines of up to $3615, enlisted help from NSW Police for patrols, and installed large signage to deter people from standing on the rock.