CN Tower

The CN Tower, located in Toronto, Ontario, Canada, is a communications and tourist tower standing 553.33m (1,815 ft 5 in) tall. Since its completion in 1976, it has been the world's tallest free-standing structure on land. The Tower is the signature icon of the city, attracting more than two million international visitors annually.

CN originally referred to Canadian National, the railway company that built the tower. Following the railway's decision to divest non-core freight railway assets, prior to the company's privatization in 1995, the CN Tower was transferred to the Canada Lands Company (CLC), a federal Crown corporation responsible for real estate development. Since local residents wished to retain the name CN Tower, the abbreviation is now said to expand to Canada's National Tower rather than the original Canadian National Tower; however, neither of these are commonly used.