Someone shared on the Facebook this page detailing several London Underground as axonometric views and suggested to use them for RPG games.

That an excellent idea. As I explained in the comment section of his post, I work in the transport industry.

I have quite often similar layouts of stations on my desk but never got the idea to take advantage of those for a game session.

Thanks for the idea Stéphane from ‎Discussions de rôlistes.