The Great Barrier Reef, stretching over 2,300 km along Queensland's coast, is home to over 1,500 fish species and is considered the most amazing reef in the world. The Sydney Opera House, located on Sydney Harbour, includes a touring theatre, ballet theatre and musical theatre within its uniquely shaped structure. Mount Kosciusko, at 2,228 meters the highest mountain in Australia, is located near the border of New South Wales and Victoria.