I believe that the Ithaca / Watkins Glen area of New York has the greatest concentration of sizable (and picturesque) waterfalls per square mile of anywhere in the United States. In the upper gorge of Buttermilk Falls State Park, water drops twenty-five feet over several shelves before swirling below. A Sigma circular polarizing filter, a steady Gitzo tripod, and a remote trigger produced tack sharp rocks yet oh-so creamy water patterns. Most time exposures of waterfalls use shutter speeds between, say, 1/4 second to a about two seconds. In this case I chose to really build the softness of the cascades and smoothly depict the white eye of the whirlpool below, so I left the shutter open on this dimly lit morning for almost a half a minute.