Subway Navigator
Maps and stations of subways and other heavy rail transit systems throughout the world, and a route finder detailing the path between any two stations.

Metros Around The World
Presents the architecture of subway systems worldwide through photographs of stations.

The Subway Page
Maps for subway transit systems from a number of cities all over the world.

UrbanRail.Net
Information on subway systems organized by continent, and news, links, literature, and a gallery of general subway information.

TubeMap.com
Provides direct links to route maps from subways around the world.

Morrison Pitt
Offers a Java-based, WAP-accessible system to navigate various subway systems across the world.

Chris's Transit Pics Website
Showcases photographs of subways, buses, railroads, and monorails from a variety of locations. Also features transportation information for tourists in New York City.