the cn tower is a telecommunications tower in toronto, ontario, canada. it is tall and is the tallest free-standing structure (meaning it cannot have wires to keep it standing) in canada, north america, and the western hemisphere. it is not the tallest building as there are no floors for people to work or live in. that title goes to one world trade center in new york city, new york, united states, which is a bit shorter at tall. it is not the tallest structure of any kind in the americas either, as the kvly-tv mast in north dakota, also in the united states, is taller at , but that needs wires to keep it upright.