The «Desfiladero de la Hermida» is a narrow valley which was formed by the river Deva. It is located in Cantabria, Spain and is enclosed by high limestone walls, at some sections up to 600 meters high. The valley and road section (N-621) is about 21 km long, with a great lot of bends through an very amazing landscape. It is in fact the longest canyon in Spain and got his name of La Hermida, one of the very pretty villages it goes through.
Other villages which deserve a stop and visit are Lamasón, Cillórigo de Lliébana, Peñarubio, Tresviso, bordering the «Principado of Asturias». It is the only route from the cantabric coast to the district of Liébana, in Cantabria.
We recommend to travel in spring or summer as this region of Spain is quite rainy and cold.
See the location in googlemaps.