Petronas Twin Towers were at one time the tallest structures on the planet. Presently the world's tallest twin structures, the 88-story structures were planned by Cesar Pelli and Associates with both towers joined at the 41st and 42nd stories (175m above road level) by a 58 meter-long, twofold decker Sky Bridge. Standing 452 meters tall, the Petronas Twin Towers held its reality title specialty until 2004 when Taipei's 101 was constructed, measuring 508 meters tall. Today, the Burj Khalifa in Dubai (opened in 2010) holds the spot as the world's tallest building. Situated in the KL downtown area, the Petronas Twin Towers' design is Islamic-enlivened and the structures fundamentally house the corporate central command of the Petronas Company and different workplaces.