I also love some of the exotic destinations carved into the stonework at Victoria, and, to a lesser extent, at Blackfriars, if these are still there.
Many stations in France - particularly on the reseau de l'ouest have maps prominently displayed on the stonework or in tiles - Dinard and Versailles Chantiers come to mind. Not forgetting tile maps at Whitby, York and probably elsewhere on the onetime NER.
And Manchester Victoria has a very good one for the L&Y system.
The Blackfriars ones are here:
https://cdn.prgloo.com/media/1e28a6f6f35e4ad1a5f71b1edae5ffc5.jpg?width=1135&height=960There are some excellent juxtapositions - Brussels, Chatham, Sevenoaks, Lucerne - and an interesting historic mix of English names (of French-speaking cities) and French names (of German-speaking cities). So we have Lyons, Geneva, Brussels, Antwerp, Marseilles... but Lucerne, Bâle, Leipsic, Frankfort, Cologne.