The Nervión waterfall is a waterfall in Spain located on the border between the provinces of Burgos and Álava in the Monte de Santiago protected natural area. At 222 metres, it is the highest waterfall on the Iberian Peninsula. The waterfall is formed by the confluence of the Iturrigutxi, Ajiturri and Urita streams, known as the River Delica, whose course is interrupted by the cliffs of the Delica Canyon. Conventionally, after the waterfall, the River Delica is known as the River Nervión.

As it flows through karstic terrain, these streams are seasonal and only flow over the waterfall for about two months of the year, coinciding with the rainy season or snow melt. The rest of the year, the waters of the karst system flow into the valley area, near the town of Orduña.

It is accessible by means of a signposted path. The waterfall can be reached from Álava, just 1 hour 30 minutes on foot from the barrier located after the village of Untza, which is the closest to the waterfall, which allows you to skirt the canyon, or you can get there by car by going up the Orduña pass, passing the remains of the Sanctuary of Monte Santiago and reaching the Salto del Nervión Viewpoint, or from Burgos, via the Berberana road.

Once over the pass or past Berberana, leave the car in the car parks set up for visitors to Mount Santiago and continue towards the viewpoint located to the east. Before reaching the viewpoint, you pass a restored wolf pen, which reminds us of the ancestral presence of the wolf in these lands.