Here's the only falls I have of Ontario. I know it's not much now but I plan on taking some more trips and will be adding to my collection someday.
This is Kakabeka Falls near Thunder Bay, Ontario and is definitely worth seeing.
We went to a few more falls while we were in Ontario on our way around Lake Superior and took some pictures of falls that we came across but I forgot which picture went where (I'm gonna have to start writing this stuff down)!
This is Black Beaver Falls
located in the Agawa Canyon
Last but certainly not least is Niagara Falls