Aber Falls is a waterfall located about two miles south of the village of Abergwyngregyn, Gwynedd, Wales. The waterfall is formed as the Afon Goch plunges about 120 feet over a sill of igneous rock in the foothills of the Carneddau range. Two tributaries merge; the enlarged stream is known as Afon Rhaeadr Fawr; from the road bridge, Bont Newydd, the name becomes Afon Aber.