CN Tower - Located in Toronto, Ontario, Canada, it is the city's landmark building. The tower is 553.33 meters high and has a beautiful shape. It is the tallest free-standing structure in the world. There is an observation deck on the top floor of the tower, where you can overlook the entire multi-wheeled landscape. There is also a revolving restaurant where you can enjoy the view and eat. The indoor playground on the first floor is a paradise for children, a world of the ocean.