(FILES) This file photo taken on February 28, 2017 shows photographs of former inhabitants of Sarnago hanging on a wall of the 'Friends of Sarnago' association museum, in the uninhabited village of Sarnago, in the northern Spanish province of Soria. Rural emigration in many areas of Castile region - where the village of Sarnago is located - as well as in Aragon and Extremadura regions was so massive in the 50s, 60s and 70s that their population density now rounds two inhabitants per square kilometer. A similar level to extreme regions such as Lapland or Siberia. / AFP PHOTO / CESAR MANSO