The Land Down Under offers top tourist attractions, from bustling Sydney and its Harbour Bridge to Ayers Rock, the Outback and the Great Barrier Reef, the world's largest coral reef system. This year's Super Bowl ad starring Chris Hemsworth and Danny McBride reached over 100 million viewers in the U.S., Australia's third-largest source market. Australia's international arrivals totaled over 8.8 million in 2017, a 6.5% increase.