Of all the waterfalls that can be found on the road from Burgos to Bilbo, Salto del NerviΓ³n is by far the most impressive. It is located near the village of Delica on the border of three provinces: Alava, Burgos and Biscay. Here the Nervion River originates, on the banks of which, 50 km downstream, lies the city of Bilbao.