Bridge of el Herreño Monument · Galapagar, Cuenca del Guadarrama, Madrid 16th-century granite bridge attributed to Juan de Herrera, built in the time of Philip II to improve the roads that carried materials and the court to the monastery of El Escorial. It stands out for its width and robustness. Photo: LBM1948 (CC BY-SA 4.0) What to see and do in Galapagar