Petronas Towers, Kuala Lumpur, Malaysia
Dominating the Kuala Lumpur skyline, at 1,483 feet the twin Petronas Towers are the tallest twin buildings ever built. They ranked as the tallest buildings in the world until 2004, when they were overtaken by Taipei 101 in Taiwan.
The buildings feature 29 double-decker, high-speed elevators in each tower, and are connected by a two-story skybridge stretching between the 41st and 42nd floors. The towers were designed by César Pelli of Argentina and Filipino-Malaysian engineer Deejay Cerico.
Visitors can purchase tickets to the skybridge and an observatory on the 86th level.