Australia has a reputation of being one of the wildest and adventurous destinations for travellers from around the world. This reputation is well deserved with plenty of activities to do and sights to see. If you are planning your vacation Down Under, then here are some really fantastic things to see and do while there. Sydney Opera House One of the most famous destinations in Australia is Sydney's famed Opera House. The building has one-hour guided tours which are conducted in several languages and a two-hour backstage tour where you can experience how performances are put together. The tour begins at 7am and includes breakfast. You can also simply attend one of the performances held here which include dance, concerts, opera and theater shows. Great Barrier Reef The Great Barrier Reef is actually bigger than the Great Wall of China and is clearly visible from space. It was named one of the seven wonders of the natural world and is 1,240 miles in size. The reef is situated along the shores of Queensland and if you are a diver or even a boat lover, this is a definite must-see when you go to Australia. Blue Mountains National Park For nature lovers Blue Mountains National Park is the perfect place to wander along walking trails, hike into gorgeous mountains and enjoy a bit of history, as the park is part of the Great Blue Mountains World Heritage Area. The area has camping and accommodations and the park is home of Australia's famous three sisters. Tall Ship Sailing and Snorkeling Australia is best known for its famous beaches and fantastic opportunities to snorkel. You can take an 8 hour tour from Whitsunday Islands and enjoy snorkeling on a protected beach and sail on a beautiful tall ship to enjoy the blue skies. Guests are provided with breakfast and lunch and the ship is restricted to less than 40 passengers to create a more relaxing and comfortable journey. Uluru-Kata Tjuta National Park There is nothing quite like visiting Uluru, better known as Ayers Rock when in Adelaide Australia. Also in the park boundaries is Kata Tjuta or the Olgas and both are impressive sights to see. The park is actually owned by the Anangu, the Aboriginal people of the area and is leased to Parks Australia. The park is open from sunrise to sunset and the rocks are definite must sees as the sun shines creating vibrant spectacles.