High Quality Content by WIKIPEDIA articles! Q1 (meaning Queensland Number One) is a supertall skyscraper located in Surfers Paradise, on the Gold Coast. It is the world`s third tallest residential tower after the 348 metre building The Marina Torch in Dubai won formal recognition as the tallest residential building in the world on 29 April 2011 by the Emporis Standards Committee and the Council on Tall Buildings and Urban Habitat. Q1 is the tallest building in Australia and the Southern Hemisphere when measured to the top of its spire (second tallest building behind Eureka Tower in Melbourne, when measured to roof and highest habitable floor) and the second-tallest free-standing structure in the Southern Hemisphere, behind Auckland`s Sky Tower. It opened in November 2005.