If you get to Ottawa, definitely take the free tour of the Parliament Building. It is an absolutely gorgeous building. If you plan to take a tour, get their early to get an English speaking guide. We were there for 2 hours. You could easily spend another hour just walking around the grounds. Definitely worth your time. There are museums, the American Embassy, the Market Center, all within walking distance. You may also witness a boat getting through the locks on Rideau Canal.
This review is the subjective opinion of a TravelPod member and not of TravelPod.com.