One of my favorite places (I have several favorite spots) at Niagara Falls is the Three Sisters Islands. This area actually has 4 islands and some locals call the last one 'Little Brother'. I'm not sure if there was a brother, but I do know that anyone who wants to go there may have a death wish. The river flows so furiously that I've never seen or heard of anyone trying to get there.
When I first visited, years ago, there was a large tree trunk wedged there, now there is a large rock visible. The depth of the water drops nearly a foot in just a few yards, it swirls and churns around this rock furiously. I always stop to admire its adamant defense of the space.
16x20 oil, not yet titled!