This is part of the falls at Eau Claire Gorge, on the north side of Algonquin Park, Ontario, just past the park boundary. The falls are quite big and the gorge is steep, so you can't get too close, but the trail is a nice walk and the overlook is a nice view.
This little waterfall had carved a channel out of the rock and I knew right away that it would make an excellent vertical panorama. This was at Watkins Glen in the north of New York State in the Finger Lakes region. This is a highly recommended gorge hike.