TUBE, METRO, SUBWAYS
- Brussels Underground
- Map of Brussels underground network
- Paris Metro
- Map of Paris underground, RER trains and buses
- Subway Navigator
- Lists underground maps for over 125 cities around the world, and tells you how long it should take to get from one station to another
- Transport for London
- Realtime travel news, information, journey planner and maps
- UrbanRail.net
- Includes underground details for more than 120 cities
