An example of an extremely tall structure is the....
CN TOWER!!
The CN Tower was the world's tallest free-standing structure from 1975-2007.
Currently, the world's tallest building is the Burj Khalifa in Dubai
So how were these towers and buildings built so tall without tipping over?
(1) Low center of gravity (near the ground)
(2) Shape of a triangle/ pyramid/ cone (where the weight it mostly at the bottom, little weight at the top)
(3) Wider the base, the more stable the structure
(4) Have holes in the structure where it isn't necessary to cover (acting like arches) - reduces weight but carries same amount of mass
(5) Structure's base is flat - therefore balanced base
(6) Strong support/ beams, etc.
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