The CN Tower is a 553.33 m-high concrete tower that was the world’s tallest free-standing structure and world’s tallest tower at the time (and held that record until 2010). The building is primarily a communications tower and tourist stop, attracting more than 2M visitors annually, but also acts as a signature icon of the Toronto’s skyline. Its name “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, it transferred the tower to the Canada Lands Company, a federal Crown corporation responsible for real estate development. Since the name CN Tower became common in daily usage, the abbreviation was eventually expanded to Canadian National Tower or Canada’s National Tower. However, neither of these names is commonly used. In 1995, the CN Tower was declared one of the modern Seven Wonders of the World by the American Society of Civil Engineers. It also belongs to the World Federation of Great Towers, where it holds second-place ranking.