1• Sydney Harbour, New South Wales
Sydney Harbour is considered by many to be one of the most beautiful harbors in the world. Crowned by the iconic Sydney Opera House and the Sydney Harbour Bridge, this famous body of water is the heart and soul of the city. Hop aboard a harbor cruise or ferry to explore its many secluded coves, tiny islands, and waterfront suburbs, or if you're feeling adventurous, sign up for the Sydney BridgeClimb adventure and admire stunning views from the top of its famous bridge.
2• Great Barrier Reef
Shimmering in luminous turquoise water, the Great Barrier Reef in Queensland is the star tourist attraction in Australia. The only living thing visible from outer space, this 2,300-kilometer-long World Heritage-listed beauty is a fragile mosaic of coral cays; seagrass beds; mangroves; and tropical islands, like the idyllic Whitsunday Islands. SCUBA dive or snorkel in the warm, clear waters to see the colorful coral and fish up close, or hop aboard a helicopter or seaplane for a bird's-eye view.
3• Great Ocean Road, Victoria
Over millennia, Mother Nature carved off huge slices of coast along the southern shores of Australia. Today, the rocky remnants of this ancient coastline rise out of the pounding sea like giant jigsaw puzzle pieces. To see these powerful forces of nature, cruise along the soaring sea cliffs of Great Ocean Road, one of Australia's most famous scenic drives. The Twelve Apostles, Loch Ard Gorge, London Bridge, and The Arch are some of the most famous landforms here. For a bird's-eye-view, hover over them in a helicopter.
The source :
https://www.planetware.com/pictures/australia-aus.htm