I am originally from Nova Scotia, my husband is from Newfoundland, and we now live in Ottawa, so I can help you out with a few locations!
We moved here from Nova Scotia in 1997. My husband was in the military and we were devastated! We wanted to stay in Nova Scotia, however, it was only a few months before we decided that Ontario was the "land of milk and honey" and Ottawa was the Promised Land. We have made Ottawa our permanent home, and my husband retired from the military and took a government job a few months ago.
The climate is a little hard to get used to as we have extreme temperatures in both winter and summer. Yesterday it was something like 40 degrees with the humidity and it gets hotter than that. In winter, it can sometimes get to -50 with the windchill. However, the good news is that the nice weather comes early and stays late, so we usually only have about 3 months of the snowy, cold weather in winter. We can still be in shorts in October, and occasional days in November. We enjoy a very close proximity to the US border (we are about 1 hr away) and we actually drive over to New York state to fly to Orlando because domestic air travel in the US is very cheap (about 1/2 the cost of flying from Ottawa).
We have beautiful lakes and mountains here in Ontario, too. There is an area called Thousand Islands near Kingston/Gananoque that is absolutely beautiful. Lots of outdoor activities and beautiful campgrounds. Here in Ottawa we are literally minutes away from the Quebec border (cross a bridge over the Ottawa River). Many people live in Quebec and work in Ottawa, and vice versa. There are many museums, and wonderful family activities.
We love the school system in Ontario. You can choose English Public, English Catholic, French Public or French Catholic. If you are in the English school system your children will have "Core" French everyday to teach them the basics. My husband and I are both completely anglephone but French for some reason is the best subject for both of our children (however, they were in French immersion until grade 2).
The health services in Ottawa are fantastic. We have several great hospitals, including CHEO (Children's Hospital of Eastern Ontario) which is world renowed. We rarely ever go to the hospital...I think the last time anyone in our family was there was about 2 years ago and that was because I was having an MRI. Usually we either go to our own doctor (who's office is attached to an xray/ultrasound clinic and has a blood lab literally down the hall) or we go to an urgent care clinic (5 mins away) where again they have xray, blood lab and pharmacy on site and they are open until 10 at night.
We love Ottawa and highly recommend the lifestyle we enjoy here!