The CN Tower is a must visit attraction in Toronto. You won't actually understand its height unless you're up there. The view of the City is amazing and the best part is the Glass Floor. My only problem with this is the pricing, to actually reach the top you have to pay a little extra and IMO it's not worth it at all. It's only a few more floors. I think they should include it in the main ticket. I haven't been to the restaurant but I've heard it's really good.