Gorges of the Esva Nature · Valdés, Eo-Navia, Asturias Included within the protected landscape of the Esva river, in the Asturian concejo of Valdés, these gorges form a canyon carved by the river along the stretch running from San Pedro de Paredes to La Chanona, between the heights of Andornoso and Villagermonde: six kilometres of gorge with up to 400 metres of elevation difference. Its 760 hectares, covered with oak groves and a strip of riverside vegetation, were declared a natural monument on 4 April 2002. Photo: Ruta Botanica (CC BY-SA 3.0) What to see and do in Valdés