These peculiar Limestone formations can be found in Western Australia in the Nambung National Park. They are a series of eerie limestone formations scattered over vast rippled sand dunes 27 kilometers (17 miles) long. Each block varies in size, with some of the largest approaching four metres in height that create an alien or moon-like atmosphere Located near the Cray fishing town of Cervantes (pop 750) the Pinnacles are 245km (152 miles) or a three-hour drive north from Perth city. Cervantes makes a wise overnight stop to give you time to enjoy the desert at sunset when the light is sublime and cast spectacularly long shadows over the rippling yellow sand dunes. Surprisingly the desert teems with wildlife, most animals are nocturnal and it is not uncommon to see western grey kangaroos, emus and many sorts of reptiles and birds hanging around these strange stones. The raw material for the limestone that makes up the pinnacles came from sea shells millions of years earlier when the area was rich in marine life. Over time the shells were broken down into lime-rich sands and carried inland by winds forming high sand dunes. The regions slightly acidic rain dissolved the small amounts of calcium carbonate as it drained through the sand and as the dune dried out during summer, the calcium cement around grains of sand in the lower levels of the dunes, binding them together and eventually producing a hard limestone rock, known as Tamala Limestone.