Organ Pipes National Park, located off the Calder Fwy in Melbourne’s West suburb of Keilor North. The Organ Pipes, a set of basalt columns formed by the cooling and cracking of molten lava, are the most well known feature of the park. The area offers a wonderful and diverse location for our bush playgroups with wildlife to spot, a river to explore and environmental centre. There is a steep paved hill that you need to walk down to access the park which is pram friendly. We take the walks slowly for young children and stop along the way but you do need to be relatively fit to walk the tracks.