Willis Tower | |
|---|---|
Height | 527m |
| Floors | 108 |
| Year | 1974 |
| City | Chicago |
The Willis Tower (formerly and informally: Sears Tower, its title until 2009) is a 110-story, 1,450-foot (442.1 m) skyscraper in Chicago. At completion in 1973, it surpassed the World Trade Center in New York City to become the tallest building in the world, a title that it held for nearly 25 years; it was also the tallest building in the Western Hemisphere for 41 years, before the new One World Trade Center surpassed it in 2013. While it held the title of'Tallest Office Building' before 2013, it dropped the title of'Tallest Man-Made Construction' after only 3 decades. The CN Tower in Toronto, which functions as a communications tower, took over the title in 1976.
The Willis Tower is considered a seminal accomplishment for engineer Fazlur Rahman Khan. It is currently the third-tallest construction in the USA and the Western hemisphere -- and the 23rd-tallest in the world.
Sydney Tower | |
|---|---|
Height | 309m |
| Floors | 0 |
| Year | 1981 |
| City | Sydney |
Sydney Tower is Sydney's tallest structure and the second tallest observation tower in the Southern Hemisphere. The title Sydney Tower is becoming common in daily usageNonetheless, the tower has been known as the Sydney Tower Eye, AMP Tower, Flower Tower, Glower Tower, Westfield Centrepoint Tower, Big Poke, Centrepoint Tower or just Centrepoint. The Sydney Tower is a member of the World Federation of Great Towers.The tower stands 309 m (1,014 ft) over the Sydney central business district (CBD), located on Market Street, between Pitt and Castlereagh Streets. It's available from the Pitt Street Mall, Market Street or Castlereagh Street and sits over the Westfield Sydney (formerly Centrepoint) shopping center. The tower is open to the public, and is one of the most prominent tourist attractions in the city, being visible from a number of vantage points throughout town and from adjacent suburbs. Auckland's Sky Tower is taller but Sydney Tower's main observation deck is almost 30 m (98 ft) higher than the observation deck on Auckland's Sky Tower.While the shopping center at the base of the tower is run by Scentre Group, the tower itself is occupied by Trippas White Group, which owns and operates Sydney Tower Dining, and Merlin Entertainments, which owns and operates the'Sydney Tower Eye' observation deck and'Oztrek' simulated ride appeal.
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