The document discusses several attractions in Australia, including the Sydney Opera House, Great Barrier Reef, and Lone Pine Koala Sanctuary. The Sydney Opera House is a performing arts center with a distinctive modern expressionist design featuring precast concrete shells. The Great Barrier Reef is the world's largest coral reef system located off the coast of Queensland, where visitors can swim, dive and see many fish and coral reefs. Lone Pine Koala Sanctuary is the world's oldest and largest koala sanctuary, home to over 130 koalas that visitors can hug along with kangaroos and emus.