The Twelve Apostles
The Twelve Apostles is the name given to a collection of natural limestone pillars standing just offshore in the Port Campbell National Park, on the Great Ocean Road in Victoria (Australia). The pillars have been formed by erosion, and are varying heights and thicknesses. A number have fallen over entirely as their bases are being continually eroded by the force of the waves. There are not actually twelve pillars, but their close proximity to one another has made the site a popular tourist attraction.

The erosion is ongoing: there used to be a feature called 'London Bridge' (because of the likeness to its namesake. Two visitors were trapped on one of the pillons when the 'bridge' collapsed several years ago (they had to be rescued by helicopter).