Alto del León Curiosity · Guadarrama, Cuenca del Guadarrama, Madrid The pass owes its name to a monument with a lion placed halfway along the road in the 18th century; taken by the rebel troops on 22 July 1936, it was renamed Alto de los Leones in 1939 and did not get its original name back until April 2000. Photo: Contando Estrelas from Vigo, España / Spain (CC BY-SA 2.0) What to see and do in Guadarrama