tower

Tallest tower in the world since 2009 2: Canton Tower: 604 m (1,982 ft) 2010: Steel concrete China: Guangzhou: Second tallest in the world 3: CN Tower: 553. shanghai tower 3 m (1,815 ft) 1976: Concrete Canada: Toronto: Tallest freestanding structure in the world 1975–2007, and the world's tallest tower until 2009; tallest in the western hemisphere: 4