Seneca Mill Falls is a scenic 40-feet waterfall adjacent to the ruins of a factory between Penn Yan and Dresden, New York.
The eight-mile Keuka Lake Outlet is a natural waterway that drains Keuka Lake at Penn Yan into Seneca Lake at Dresden. Along its course, dotted with the ruins of old mills and factories, it drops 280 feet and offers several spectacular waterfalls.
The waterway is paralleled with an abandoned New York Central railroad that was converted into the Keuka Lake Outlet Trail, open to cyclists and pedestrians. It meanders between Penn Yan and Dresden and at one point, enters one of the 27 locks that serviced the long-disused Crooked Lake Canal.
At Seneca Mills are an abandoned paper factory, dam, and a Crooked Lake Canal lock.