The Canadian National Tower in Toronto is officially recognized as the world's tallest tower, standing at 1,815 feet and 5 inches. It entered the Guinness Book of World Records on March 30, 1975, and still holds that distinction as of November 2010. The tower is used to broadcast both television and radio signals.
Ostankino Television Tower in Moscow, Russia, is the world's second tallest tower at 1,771 feet. Construction on the tower took 54 months and was completed in 1967. Ostankino held the record for height until 1975. The tower has a three-story restaurant and is used for television and radio broadcasting. Because of the building's height, it is also used for recording weather conditions.
The Oriental Pearl Tower in Lujiazui, China, is the world's third tallest tower, standing at around 1,535 feet. The tower was completed in 1995 and is one of the area's main tourist attractions. The Oriental Pearl has an observation deck, revolving restaurant and a bar. The tower is also used for broadcasting television.
Milad Tower, in Tehran, Iran, is the world's fourth tallest tower, standing at 1,427 feet. The tower was completed in 2005 and contains a five star hotel, a convention center, conference facilities and a telecommunications tower. The television mast makes up 393 feet of the tower's total height.
