The Rialto Towers is a skyscraper, located at 525 Collins Street, in the west side of Melbourne's Central Business District, and was the tallest building in the Southern Hemisphere when it was built, between 1982 and 1986. It consists of two conjoined towers, the height of the southern tower is 251 meters, and it consists of 55 floors, and the northern and shorter tower, which are 185 meters tall and consist of 43 meters. In addition, on the roof of the fifty-fifth floor of the South Tower, there is a luxurious restaurant, opened in 2009, serving various types of delicious international cuisine, as well as providing you with a stunning panoramic view of the city.