A lot of people don’t realize that you can walk across the Rainbow Bridge, but you can. There is a footbridge as well as a roadway. This is probably where you will get the best view of the Falls.
There is a small fee per person to get onto the bridge, so it’s not exactly free, but the cost is minimal (50 cents per person).
Also, there is a plaque midway across the bridge which shows you the division line between Canada and the United States. Kids love it when they can stand in two countries at one time!
Note: You need to have valid Canadian Visa to come back and valid US Visa to across the middle of the bridge (border line).
