Situated in Toronto, CN Tower was built in the year 1976. Until September 2007, CN Tower was the longest free standing structure in the world; holding the record for more than 31 years. Rising to a height of 553.33m, CN Tower still remains the pride of Canada. Recognized as a one of the modern seven wonders of the world by American Society of Civil Engineers, CN Tower draws more than 2 million visitors on an annual basis. CN Tower is a communication and observation tower.