CN Tower offers a fun (and pretty quick) ride to the top of the tower. It can be pretty darn busy, with everyone trying to get photos with the best views. I admit I felt a bit claustrophobic, but it was because of the kids and crowds. They did have cool places where you could stand on clear (Plexiglas?) floors and see through to the drop below. That was pretty cool! When I thought I couldn't take any more, we went up to the upper deck, which has wind blowing through...there were far fewer people up there, and it was awesome! Loved seeing the city and island from above.