Ojos Negros Greenway (Altura section) Nature · Altura, El Alto Palancia, Castellón The Vía Verde de Ojos Negros is a former railway route, passable on foot or by bicycle, which also runs through the municipality of Altura. It follows the route of the old Ojos Negros-Sagunto narrow-gauge mining railway, which operated between 1907 and 1972; after its closure the tracks were lifted and the current path was laid out, 182.2 kilometres long between Ojos Negros (Teruel) and Albalat de Taronchers (Valencia), making it the longest greenway in Spain. It forms part of the Santander-Mediterranean Axis of the Natural Trails Network of the Ministry of Agriculture, Fisheries and Food, and is organised into three stages, the second of which reaches the Escandón pass, the highest point of the route. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Altura