El Escorial is a dramatic monastery , mausoleum , and palace built by Felipe II , and one of the most-visited places in Spain ; and nearby is El Valle de los Ca ? ­ dos ( Valley of the Fallen ) , Franco 's memorial to his reign and soldiers killed in the Civil War of 1936 1939 .
Valley of the Fallen is often visited by the children of veterans of the Civil War of 1936 .