At 553.3-metres (1,815-foot), it held the position of tallest free-standing structure and tallest tower in the world for 34 years, now relegated to second place. Built by the Canadian National (CN) railway company, the communications tower was completed in 1976 and in 1995 was named one of the modern Seven Wonders of the World by the American Society of Civil Engineers.
There are two viewing platforms: the seven-storey main deck (located at 346-metres) and the Sky Pod (at 446.5-metres). For a nausea-inducing experience, at 342-metres there’s a 24-square-metre glass floor. The 360 Restaurant is revolving, and takes 72 minutes to complete a turn (the view is exceptional, the prices extortionate). A ticket for the main deck, glass floor and elevator to the Sky Pod is $28.99 for an adult (see City Pass).