The construction of the CN Tower (Canadian national tower) was finished in 1975 and held the world record for tallest freestanding structure until 2010, But it is still the tallest freestanding tower in the western hemisphere, The tallest tower and 6th tallest freestanding structure world wide, It is 1,815.3 feet tall and over 2,000,000 people visit it each year, It is one of the modern wonders of the world. It has a sky pod where visitors can stand on a glass sheet that is 348 meters above the ground, The 2.5 inch thick glass can hold the equivalent weight of 36 moose, From the skypod you can see 100 miles on a clear day. The CN tower is almost completely vertical it is off by 1.1 inches.
It is able the withstand a earthquake of of 8.5 of the richter scale and winds of 270 miles per hour, Though they don't get many earthquakes there. There is a restaurant in the CN tower that rotates, It takes 72 minuets to rotate completely. The last piece of the tower has put in place on April 2 1975, They used a helicopter with a crane to put it on, In the process the helicopter got caught on the tower with only 30 minuets of fuel left, Workers were able to free it and it safely landed with 17 minutes of fuel left in its tank.
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End of the lad's report. I added this video.