Piedra del Castillo (Castle Rock) Nature · Fuertescusa, Serranía Alta, Cuenca Image of Fuertescusa, not of the place itself. A large rock at the entrance to the village of Fuertescusa that in the past served as a natural defensive watchtower. Today it holds a via ferrata with two different routes that allow climbers to ascend it and take in the Escabas valley. Photo: Ripeforte (CC BY-SA 4.0) What to see and do in Fuertescusa