Trying to find a shutter speed for the falls itself, the pool it falls into, and the stream flowing out of it was a challenge, but I'm pretty happy with what I got here at 1/4 second. I had a polarizer on the lens as well, as much for its light loss (this was at f/22) as anything; but I think it helped the water outflow a lot. Note the bit of rainbow in the mist in the basin to the right.