I live by the sea and like walking along the coastline including scrambling over the rock ledges in Noosa National Park. All the way from Noosa to Sydney it is possible to find wave-cut platforms etched out of the sandstone towards the bottom of the cliff faces.

The sandstone is very old, thought to date from the time of the dinosaurs, perhaps 180 million years ago, but the ledges – referred to as platforms when they are wide – are much younger.