While the leaves are falling is a great time for waterfall photography. Watch for brightly colored leaves (consider adding your own) that are moving in circles, then formulate a composition that includes them.
I did not need to add leaves to this swirl, but I occasionally forced a break up of the pile to get a different look to the swirling. I experimented with shutter speeds and even tried digital neutral density filter processing that combined multiple shots, but this shot out of the camera was as good as any of the other results.
This un-named falls is found along the Rose River Trail in Shenandoah National Park.