Metro Bits:Exploration of subways around the world, including arts and architecture, logos, unique destinations, FAQs and trivia, and pictures.
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.
Morrison Pitt: Offers a Java-based, WAP-accessible system to navigate various subway systems across the world.
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.
The Subway Page: Maps for subway transit systems from a number of cities all over the world.
TubeMap.com: Provides direct links to route maps from subways around the world.
UrbanRail.Net: Information on subway systems organized by continent, and news, links, literature, and a gallery of general subway information.