how tall is the cn tower in toronto canada
CN Tower. This article is about the CN Tower in Toronto, Ontario. For the tower in Edmonton, Alberta, see CN Tower (Edmonton). The CN Tower (French: Tour CN) is a 553.3 m-high (1,815.3 ft) concrete communications and observation tower in downtown Toronto, Ontario, Canada. Built on the former Railway Lands, it was completed in 1976, becoming the world's tallest free-standing structure and world's tallest tower at the time.