The London metro is properly called the London Underground. The London Underground
or the Tube is fast, clean, efficient, and arguable the safest metro
in Europe. Passengers are frequently cautioned to “Mind the
Gap”. The London Underground is divided into zones. Most of
the tourist attractions are within zone 1 and zone 2. Automated
ticketing is available at all the major stations. Pocket size metro
maps are provided free at the information desks; However, stations
and trains are well marked making it easy to get around with or
without a map.