Q1 (meaning Queensland Number One) is a skyscraper in Surfers Paradise, on the Gold Coast, Queensland. It lost its title as the world's tallest residential tower to the 348 metre building The Marina Torch in Dubai on 29 April 2011. As of May 2012, it is the fifth tallest such building. Q1 is the tallest building in Australia and the Southern Hemisphere when measured to the top of its spire (third tallest building behind Eureka Tower and Rialto Towers, both in Melbourne, Victoria, when measured to roof and highest habitable floor) and the second-tallest free-standing structure in the Southern Hemisphere, behind the Sky Tower in Auckland, New Zealand. It opened in November 2005.