I remember going to Niagara Falls. We spent a couple of days on the American side, then a week on the Canadian side. You can't see much of anything on the American side. They all face Canada.
However, I enjoyed the American side as I got to go to the island between the falls.
My favorite part was going behind the falls and seeing the "backside of water." It was on the Canadian side in some sort of cave.
RE: The strong Niagara Falls