From the erosion, the soft limestone cliffs turn into caves in the cliffs. Later, these caves carved into arches. Eventually, the arches collapse, leaving the limestone stacks standing.
It’s anticipated that the existing headlands will eventually turn into new limestone stacks.
A final thought. Who knows when the harsh and extreme weather conditions from the Southern Ocean will cause more Apostles to collapse? This extraordinary sight is worth visiting.
Other than the look-out point, the coastline is a real gem to enjoy a walk on the beach. If you have time on your side, don’t rush it.
This popular tourist attraction was originally known as the Pinnacles, and the Sow and Pigs (or Sow and Piglets, with Muttonbird Island being the Sow and the smaller rock stacks being the Piglets).
You’d think because of the name there are 12 Apostles, but Australia’s Twelve Apostles were only eight to start with!
Furthermore, of the original eight Apostles, only seven have survived the erosion from the waves. The first lime stack collapsed in July 2005, measuring 50 m (160 ft) high.
About two hours is a good estimate.
Additional stacks are located to the west of Port Campbell National Park. Although the additional stacks are not part of the Apostles Group, they are a beautiful extension of the sight.