Although Google maps is very good for finding locations of cities, towns, villages. and rivers, it is a bit lacking when it comes to topographical features, such as ridges, hills, etc.
Maps of France
Francois Lo Presti recently pointed out to me an on-line source of 1:50,000 scale maps for France. It is Geoportail: https://www.geoportail.gouv.fr
To access the 1:50,000 scale maps click on Cartes in the upper left corner and then on Carte IGN.
Maps of Spain
Can be found at: http://www.ign.es/iberpix2/visor/
Maps of Portugal
Can be found at: http://www.igeo.pt/mapviewer/?wmsurl=http://www.igeo.pt/WMS/Cartografia/SC50K
@John Gill, please download my "Ciudad Rodrigo Sieges" kmz file from here: https://bit.ly/Ciudad_Rodrigo_kmz and open it in Google Earth (free English Pro version download here) Explore maps, bibliography and views. Use 3D terrain and different transparencies and navigate using keyboard and mouse. Please, provide feedback.