23 Marina is a 90-story, 392.8 m (1,289 ft) residential skyscraper in Dubai, United Arab Emirates. It was the World's tallest all-residential building until the completion of the nearby Princess Tower. The Tower has 57 swimming pools and each duplex in the tower is equipped with its own private elevator. The building was 79 percent sold before construction started. The raft was completed on 30 April 2007. In June 2011, 23 Marina topped out and became the second-tallest building in the city and the tallest residential building in the world.