The 12 Apostles Australia

Rising out of the Southern Ocean, alongside Australia's famous Great Ocean Road, you'll find the 12 Apostles – limestone pillars that were once connected to the mainland cliffs. Waves and wind carved them into caves, then arches, and eventually battered them down into 45-metre (150-foot) tall columns. There are, in fact, only eight Apostles at the moment, but who knows when the next stretches of cliff will become pillars.