Skyscrapers can't be built in the usual way. Buildings that reach excessive heights are made almost completely of steel and concrete that together serve as the base to support walls. The world's biggest cities are likely home to a mega-tall building or two. Six across the globe are among a handful that rise into the rarefied air of worldwide fame.
Burj Khalifa, Dubai, United Arab Emirates
The Burj Khalifa building was completed in 2010. It has the distinction of being the tallest building/skyscraper in the world. Made of steel and concrete, it is 2,716 feet high, has 58 elevators and 163 floors.
Taipei 101, Taipei, Taiwan
Standing 1,666 feet tall, the Taipei 101 building has 101 floors, 63 elevators and five floors below ground. The structure is made of composite and was competed in 2004.
Shanghai World Financial Center, China
The Shanghai World Financial Center in China is made distinct by a big window on top. It stands 1,614 feet high and has 101 floors, with three floors below ground, and 31 elevators. Construction began n 1997 and was completed in 2008.
Petronas Twin Towers, Kuala Lampur, Malaysia
Both Petronas Towes in Kuala Lampur, Malaysia, are 1,482 feet tall. Each building has 88 floors and 39 elevators, with five floors below ground. Both were under construction for six years and were completed in 1998.
Willis Tower, Chicago
The Willis Tower, formerly the Sears Tower, was under construction from 1970 to 1974. It continues to hold the distinction of being the tallest building in North America and Chicago. It is 1,450 feet high. It has 108 floors, 104 elevators and three floors below ground.
Trump International Hotel and Tower, Chicago
The Trump International Hotel and Tower is the second tallest building in North America, and the second tallest building in Chicago. It is 1,388 feet high, has 98 floors, 27 elevators and two floors below ground. It was completed in 2009.