This short walk goes through the Canyon of Los Arcos in the La Hoz valley. The route through the gorge is made possible by a chain of footbridges. The narrow passage on the Puenta de la Toba is simply beautiful. The path continues to follow the Rio Blanco to the ruins of the Abajo mill. Here you climb to the ridge and then walk back high above the Canyon. You will certainly see griffon vultures that have their nests in the rocks just beyond the starting point. In addition, there is a chance that you will see ibexes on the mountain sides.