You may have to be a bit more specific - what country / city / era? There are quite a lot available for some parts of the world, but rather less for others. As you haven't put your location in your profile, it's a bit hard to second guess what you might want either.
As you called them subways, I guess you might be from North America, so I guess that the subway stations by Compudoc on the DLS may well suit you...
Paul
