Mountains and oak groves of Serradilla Nature · Serradilla del Arroyo, Ciudad Rodrigo, Salamanca Image of Serradilla del Arroyo, not of the place itself. Municipality of 80.5 square kilometres spread between the settlements of Serradilla and Guadapero, with part of its territory inside the natural park of Las Batuecas-Sierra de Francia. Its climate gives rainy winters and markedly dry summers. Photo: Hovallef (CC BY-SA 4.0) What to see and do in Serradilla del Arroyo