Near Montebello, VA 1976
While we are on the subject of waterfalls, I will share this image of the highest cascade drop east of the Mississippi. What a day hike this is, and just when you think you reach the top, there is yet another fall. It is an altitude gain of about 1500 feet. There used to be a sign at the top warning you not to step out onto the rocks.
From past experience, I can tell you that it would mean almost instant death. Those rocks are covered with slippery growth, and once you slip you are gone.
The exposure for this 2 1/4 film image (Ektachrome 64) was about one second at f22.