Niagara River gorge fall shots.
Surprised no one else responded. I think these are nice. You were able to capture the energy of the water. Were you stacking ND filters or use a Vari-ND filter? The only thing I would suggest is shooting either around sunset or sunrise with less direct sunlight, but I like your composition and how you handled the flow of water.
Oh, and I would also lose the tram/power lines... and maybe even the buildings on the cliffs...