The Organ Pipes – Melbourne. Photos taken in July 2005. There are in this park over 400 million volcanic geological formations. From fossils in the rock it has been surmised the area was buried under the sea about 400 million years ago nad gradually exposed through erosion by the Maribyrnong river. For those interested in how the earth was formed and violently shaped – a must visit. Google it for more inforamtion. Fascinating place missed by many a tourist.