The CN Tower, is a communications and observation tower located in downtown Toronto, Ontario, Canada.
Named for the company that built it (Canadian National Railways), construction began on the 553.3-meter-tall tower in 1973. Extensive excavations occurred to dig for the structure’s foundation. More than 56,000 tonnes of earth and shale had to be removed.
At time of completion in 1976, the CN Tower was the world’s tallest free-standing structure and the world’s tallest tower. Today, it remains the tallest free-standing structure in the Western Hemisphere, but holds the title of third tallest tower in the world.
Quick Construction Facts
- 40,500 m3 of concrete used
- 450 tonnes of rebar
- 36 tonnes of steel cable
- Total weight of 118,000 tonnes
Wonder of the World
The CN Tower was classified as one of the Seven Wonders of the Modern World in 1995 (along with the Empire State Building, Golden Gate Bridge, and the Panama Canal).
Feel Like Visiting?
You’re not alone. The tower garners approximately 1.5 million international visitors per year with features such as the Edgewalk, it’s famous glass floor, and revolving restaurant.