4. EdgeWalk CN Tower – CanadaEdgeWalk is CN Tower’s most thrilling attraction in its history, and the first of its kind in North America. Located on the roof of the CN Tower’s restaurant at a height of 1,168 feet (356 meters), it is the world’s highest full circle hands-free walk.The EdgeWalk allows visitors to slip into climbing harnesses and walk around the edge of Canada’s tallest structure.
There’s also a glass floor 1,122 feet (342 meters) above ground level, and although the glass is only 2.5 inches thick, it’s reportedly strong enough to hold 14 hippos — if they could fit in the elevator. CN Tower also has glass-floored observation deck and outdoor SkyTerrace.