Architecture

The World's Tallest Buildings: How High Can We Go?

Today, the world's tallest buildings stretch hundreds of feet into the clouds, creating dramatic spires on the skylines. See how these impressive edifices are built, and hear about the future of skyscrapers--including plans for a building that contains caves, glaciers, and other ecosystems!

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Key Facts In This Video

  1. The three wings are set at 120 degrees from each other and set around a concrete central hub. 00:39

  2. Double decker lifts move at 10 meters/second to help ferry visitors up and down the building. 01:24

  3. Originally the project was going to be called the Burj Dubai, however they had to call on the UAE president, Mr. Khalifa, to help pay for the construction during the recession. 01:46

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Key Facts In This Video

  1. The team that cleans the Burj Khalifa's topmost windows rappels with ropes and uses buckets with squeegees. 00:00

  2. When wind hits very tall buildings, it can form small whirlwinds that create low-pressure areas. 02:15

  3. It takes around 3 months to clean all of the Burj Khalifa's 24,000 windows. 03:25

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