Where can I find the topographical map legends?

France

The legends of the IGN France maps can be found here: https://www.geoportail.gouv.fr/

Belgium

The legends of the IGN Belgium maps can be found here: https://topomapviewer.ngi.be/

Switzerland

https://www.swisstopo.admin.ch/content/swisstopo-internet/en/swisstopo/publications.download/swisstopo-internet/fr/publications/karto-publications/shop/symbols_en.pdf

Spain

https://previa.uclm.es/profesorado/marodriguez/pdf/materiales/GeografiaDidactica/GeografiaDidactica_Tema2_MapaTopografico.pdf

United States

https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf

Canada

http://cartotheque.uqac.ca/cartes/toporama/G3452S11c2s050TOPORAMA_Legende.html