The CN Tower, built in 1976 in Toronto, Canada, was the world's tallest tower at the time and remained so until 2010. Although now only the world's third tallest, you can see how it still dominates the Toronto skyline!
The Rocky Mountains, or Rockies, stretch more than 3,000 miles from western Canada to the south western United States. You can see why the Rockies are so popular with hikers and tourists from this lovely photographic poster.