Mornington Crescent!

Assuming some sort of magical relationship between stations, railway lines, etc, with the same names... I need a succession of subway (or whatever) stations / lines that will take me from London to Los Angeles and back again, but preferably by a different return route.

For example, I could go from London (Royal Oak station) to Vancouver (Royal Oak Station) as one jump; in Vancouver there are apparently 47 stations on three or four lines; presumably one or more of them coincides with the name of a station or line in another city, and so forth.

Another example - there are three Cannon Street stations (although all are in Britain)

And another - there are Epping stations in London, Sydney, and Melbourne

What I would ideally like is one route out and another back, preferably via well-known cities etc, but I'll settle for a single route and obscure locations if it can't be done. Closed stations and lines are OK.

Anyone got any ideas on how to work this out - is there a master list of every subway station in the world somewhere?

later and it's cracked already, mostly by pauldrye! Many thanks to everyone who helped with this, it's greatly appreciated. Fanfic may ensue in due course...