The arch is one of the tourist attractions along the Great Ocean Road near Port Campbell in Victoria. It was formed by a gradual process of erosion, and until 1990 formed a complete double-span natural bridge.
The arch closest to the shoreline collapsed unexpectedly one day in January, 1990, leaving a small group of tourists stranded on the outer part: they had to be rescued by helicopter. Fortunately, no one was injured in the event.
Prior to the collapse, the formation was known as London Bridge.