The Sydney Opera House, one of the most famous and easily recognizable buildings in the world, is a symbol of Australia’s largest city and one of the main attractions of the continent – the sail-shaped shells that form the roof make this building unlike any other in the world. The Opera House is recognized as one of the outstanding buildings of modern architecture in the world and since 1973 is, along with the Harbour Bridge, the hallmark of Sydney. On June 28, 2007, the theater was included by UNESCO in the list of World Heritage Sites. The Sydney Opera House was opened on October 20, 1973 by Queen Elizabeth IISolid areas: 12%