6. CN Tower
CN Tower, located in Toronto, is the second tallest tower in the world with a height of 553 meters. Built as a television and radio transmitter tower, the building is named after the Canadian National railway company. The purpose of the tower is to build a transmitter station and to show Canadian industrial power to the world. If you’re visiting Toronto, you should see CN Tower. Inside the tower, there is an observation tower, restaurants, and shops.