As you approach the city of Toronto, the first thing you notice is this slim structure where there are walled glass elevators that slide up to 553m (1.815ft) high.
This is the CN Tower, the tallest freestanding structure in the world. The first lifts stop at 346m high (1.136 ft). Look out of level. (It takes just 58 seconds, so prepare to pop your ears.)
You can go down one level to experience the glass floor, my favorite place in the tower: Through it, you can see all the way down to street level. The glass can support the weight of 14 adult hippos. That is a sight you would like to see!
Here is the Skypod, 447m (1.466 feet) above the ground, which is a vantage point from where on a clear day you can see Niagara Falls, 161 kilometers (100 miles) to the south, and Lake Simcoe, 193 kilometers (120 miles) north.
To withstand the elements, the CN Tower is constructed of tough material - cast reinforced concrete covered with a thick glass-reinforced plastic - and designed to keep ice build-up to a minimum. The structure can withstand strong winds, snow, ice lightning, and earthquakes.