Wonder-Full Oz AUSTRALIA In a country with more than 500 national parks and 15 World Heritage-listed wonders that are bursting full of rare wildlife and ancient forests where do you begin? Here are four great places to start.Four unmissable natural wonders1. Bungle BunglesThe distinctive beehive-shaped towers are made up of sandstone, pebbles and boulders. These striking formations are 350 to 375 million years old and were formed when active volcanoes were shaping the landscape. Weathering also helped create this marvel, after a few million windswept years of being hammered by showers, water seeped into the rock then expanded and night when the temperature dropped.If you want to check out the Bungle Bungles, stay at the multi-award winning Kununurra YHA hostel in the heart of Kununurra. It's your gateway to the spectacular gorges and waterfalls of Hidden Valley National Park, the impressive Lake Argyle, El Questro Wilderness Park and the World Heritage Bungle Bungles.2. The Grampians The Grampians National Park is Victoria's best kept secret, known for its striking series of sandstone mountain ranges. Located 235 kilometres west of Melbourne, the Grampians National Park was placed on the Australian National Heritage List in 2006 for its outstanding natural beauty and its standing as one of the richest Indigenous rock art sites in the country. The Grampians Eco YHA, a stylish, comfortable hostel at the doorstep of the national park in Halls Gap, is a great place to base yourself for your outdoors adventures, with hiking and rock-climbing just a stroll away.3. Fraser IslandFraser Island, 300km north of Brisbane, is the largest sand island in the world and boasts amazing and pristine beaches famous for 4WD adventures and camping. If you like adventure and nature and tropics and dingos this is the place to go. Hervey Bay YHA is the ideal launching pad for the island, especially on one of YHA's convenient tours, and a great place to unwind afterwards.4. Freycinet National ParkFreycinet National Park is one of Tasmania's most popular destinations with secluded beaches, spectacular scenery, red granite mountains and clear blue water. The Iluka Backpackers YHA is the perfect home base, situated in the Coles Bay township, only one kilometre from the Freycinet National Park.